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Wave interference

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93: 263: 5446:'s double slit interferometer in 1803 demonstrated interference fringes when two small holes were illuminated by light from another small hole which was illuminated by sunlight. Young was able to estimate the wavelength of different colours in the spectrum from the spacing of the fringes. The experiment played a major role in the general acceptance of the wave theory of light. In quantum mechanics, this experiment is considered to demonstrate the inseparability of the wave and particle natures of light and other quantum particles ( 3234: 226: 1411: 2185: 1419: 5519: 3258: 6906: 5567:. This technique works by superposing (interfering) the signal waves from the different telescopes on the principle that waves that coincide with the same phase will add to each other while two waves that have opposite phases will cancel each other out. This creates a combined telescope that is equivalent in resolution (though not in sensitivity) to a single antenna whose diameter is equal to the spacing of the antennas farthest apart in the array. 3149:
period will give rise to an interference pattern while they overlap. Two identical waves which consist of a narrow spectrum of frequency waves of finite duration (but shorter than their coherence time), will give a series of fringe patterns of slightly differing spacings, and provided the spread of spacings is significantly less than the average fringe spacing, a fringe pattern will again be observed during the time when the two waves overlap.
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amplitudes—this is known as destructive interference. In ideal mediums (water, air are almost ideal) energy is always conserved, at points of destructive interference, the wave amplitudes cancel each other out, and the energy is redistributed to other areas. For example, when two pebbles are dropped in a pond, a pattern is observable; but eventually waves continue, and only when they reach the shore is the energy absorbed away from the medium.
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the wavelength decreases and the summed intensity will show three to four fringes of varying colour. Young describes this very elegantly in his discussion of two slit interference. Since white light fringes are obtained only when the two waves have travelled equal distances from the light source, they can be very useful in interferometry, as they allow the zero path difference fringe to be identified.
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the sum of the displacements of the individual waves. At some points, these will be in phase, and will produce a maximum displacement. In other places, the waves will be in anti-phase, and there will be no net displacement at these points. Thus, parts of the surface will be stationary—these are seen in the figure above and to the right as stationary blue-green lines radiating from the centre.
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Conventional light sources emit waves of differing frequencies and at different times from different points in the source. If the light is split into two waves and then re-combined, each individual light wave may generate an interference pattern with its other half, but the individual fringe patterns
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as the sounds alternately interfere constructively and destructively. As the two tones gradually approach unison, the beating slows down and may become so slow as to be imperceptible. As the two tones get further apart, their beat frequency starts to approach the range of human pitch perception, the
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It is also possible to observe interference fringes using white light. A white light fringe pattern can be considered to be made up of a 'spectrum' of fringe patterns each of slightly different spacing. If all the fringe patterns are in phase in the centre, then the fringes will increase in size as
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have emission lines with quite narrow frequency spectra. When these are spatially and colour filtered, and then split into two waves, they can be superimposed to generate interference fringes. All interferometry prior to the invention of the laser was done using such sources and had a wide range of
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Consider, for example, what happens when two identical stones are dropped into a still pool of water at different locations. Each stone generates a circular wave propagating outwards from the point where the stone was dropped. When the two waves overlap, the net displacement at a particular point is
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Quantum mechanically the theories of Paul Dirac and Richard Feynman offer a more modern approach. Dirac showed that every quanta or photon of light acts on its own which he famously stated as "every photon interferes with itself". Richard Feynman showed that by evaluating a path integral where all
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The discussion above assumes that the waves which interfere with one another are monochromatic, i.e. have a single frequency—this requires that they are infinite in time. This is not, however, either practical or necessary. Two identical waves of finite duration whose frequency is fixed over that
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on a reflective surface. Light rays from a monochromatic source pass through the glass and reflect off both the bottom surface of the flat and the supporting surface. The tiny gap between the surfaces means the two reflected rays have different path lengths. In addition the ray reflected from the
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system was defined to be equal to 1,650,763.73 wavelengths of the orange-red emission line in the electromagnetic spectrum of the krypton-86 atom in a vacuum. This definition was replaced in 1983 by defining the metre as the distance travelled by light in vacuum during a specific time interval.
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Normally, a single laser beam is used in interferometry, though interference has been observed using two independent lasers whose frequencies were sufficiently matched to satisfy the phase requirements. This has also been observed for widefield interference between two incoherent laser sources.
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generally approximates much more closely to a monochromatic source, and thus it is much more straightforward to generate interference fringes using a laser. The ease with which interference fringes can be observed with a laser beam can sometimes cause problems in that stray reflections may give
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of a wave meets a crest of another wave of the same frequency at the same point, then the amplitude is the sum of the individual amplitudes—this is constructive interference. If a crest of one wave meets a trough of another wave, then the amplitude is equal to the difference in the individual
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Interference of light is a unique phenomenon in that we can never observe superposition of the EM field directly as we can, for example, in water. Superposition in the EM field is an assumed phenomenon and necessary to explain how two light beams pass through each other and continue on their
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produces a spherical wave. If the light from two point sources overlaps, the interference pattern maps out the way in which the phase difference between the two waves varies in space. This depends on the wavelength and on the separation of the point sources. The figure to the right shows
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was developed. Astronomical radio interferometers usually consist either of arrays of parabolic dishes or two-dimensional arrays of omni-directional antennas. All of the telescopes in the array are widely separated and are usually connected together using
3224:. For example, the colours seen in a soap bubble arise from interference of light reflecting off the front and back surfaces of the thin soap film. Depending on the thickness of the film, different colours interfere constructively and destructively. 3131:
to give rise to interference fringes since it is not possible for waves of different polarizations to cancel one another out or add together. Instead, when waves of different polarization are added together, they give rise to a wave of a different
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possible paths are considered, that a number of higher probability paths will emerge. In thin films for example, film thickness which is not a multiple of light wavelength will not allow the quanta to traverse, only reflection is possible.
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of an optical interference pattern. The intensity of the light at a given point is proportional to the square of the average amplitude of the wave. This can be expressed mathematically as follows. The displacement of the two waves at a point
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To generate interference fringes, light from the source has to be divided into two waves which then have to be re-combined. Traditionally, interferometers have been classified as either amplitude-division or wavefront-division systems.
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Photograph of 1.5cm x 1cm region of soap film under white light. Varying film thickness and viewing geometry determine which colours undergo constructive or destructive interference. Small bubbles significantly affect surrounding film
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Constructive interference occurs when the waves are in phase, and destructive interference when they are half a cycle out of phase. Thus, an interference fringe pattern is produced, where the separation of the maxima is
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of the same frequency intersect at an angle. One wave is travelling horizontally, and the other is travelling downwards at an angle θ to the first wave. Assuming that the two waves are in phase at the point
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Real wave interference is obtained simply by adding the displacements from equilibrium (or amplitudes) of the two waves; In complex wave interference, we measure the modulus of the wavefunction squared.
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where the path difference is an even multiple of λ/2 the waves cancel. Since the gap between the surfaces varies slightly in width at different points, a series of alternating bright and dark bands,
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can be considered to be a multiple-beam interferometer; since the peaks which it produces are generated by interference between the light transmitted by each of the elements in the grating; see
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Because the frequency of light waves (~10 Hz) is too high for currently available detectors to detect the variation of the electric field of the light, it is possible to observe only the
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It is sometimes desirable for several waves of the same frequency and amplitude to sum to zero (that is, interfere destructively, cancel). This is the principle behind, for example,
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will present a peculiar effect: when the two tones are close in pitch but not identical, the difference in frequency generates the beating. The volume varies like in a
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creates ultrasonic waves that are radiated into the medium. The waves strike a reflector placed parallel to the crystal, reflected back to the source and measured.
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Interferometry has played an important role in the advancement of physics, and also has a wide range of applications in physical and engineering measurement.
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generated will have different phases and spacings, and normally no overall fringe pattern will be observable. However, single-element light sources, such as
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When the plane of observation is far enough away, the fringe pattern will be a series of almost straight lines, since the waves will then be almost planar.
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interference between two spherical waves. The wavelength increases from top to bottom, and the distance between the sources increases from left to right.
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Thus, the interference pattern maps out the difference in phase between the two waves, with maxima occurring when the phase difference is a multiple of 2
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indicates that the object can be in situation A or situation B. The above equation can then be interpreted as: The probability of finding the object at
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Interference occurs when several waves are added together provided that the phase differences between them remain constant over the observation time.
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is used to divide the light into two beams travelling in different directions, which are then superimposed to produce the interference pattern. The
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This represents a wave at the original frequency, traveling to the right like its components, whose amplitude is proportional to the cosine of
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was fond of saying that all of quantum mechanics can be gleaned from carefully thinking through the implications of this single experiment.
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line in the new standard, and also showed that it could be used as a length standard. Sixty years later, in 1960, the metre in the new
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It is easy to see that a set of waves will cancel if they have the same amplitude and their phases are spaced equally in angle. Using
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The above can be demonstrated in one dimension by deriving the formula for the sum of two waves. The equation for the amplitude of a
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of the wave. Suppose a second wave of the same frequency and amplitude but with a different phase is also traveling to the right
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in the above equation depending on whether the quantum interference term is positive or negative. If this term is absent for all
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Interference of right traveling (green) and left traveling (blue) waves in Two-dimensional space, resulting in final (red) wave
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function. A classical wave at any point can be positive or negative; the quantum probability function is non-negative.
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above, the quantum interference term can add (constructive interference) or subtract (destructive interference) from
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On the mechanism of the eye / by Thomas Young.; Young, Thomas; University College, London Library Services (1801).
5341:. The interference pattern occurs on the far side, observed by detectors suitable to the particles originating the 3472: 1359: 961:{\displaystyle W_{1}+W_{2}=2A\cos \left({\varphi \over 2}\right)\cos \left(kx-\omega t+{\varphi \over 2}\right).} 243: 6841: 6550: 6545: 6268: 5458: 5373: 4130: 3579: 3559: 3427: 3199: 5420:, as the beat frequency of any two tones is equivalent to the frequency of their implied fundamental frequency. 6853: 6525: 3819: 3549: 3133: 2067: 246:
states that when two or more propagating waves of the same type are incident on the same point, the resultant
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function representing the displacement from an equilibrium position; an optical or quantum wavefunction is a
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Optical interference between two point sources that have different wavelengths and separations of sources.
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to interfere. In practice this means the wave must come from the same source and have similar frequencies
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Cropped tomography scan animation of laser light interference passing through two pinholes (side edges).
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The fringes are observed wherever the two waves overlap and the fringe spacing is uniform throughout.
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instruments that can produce sustained tones, beats can be readily recognized. Tuning two tones to a
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from electrons, atoms or molecules approach a barrier with two slits in it. One slit becomes
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The Elegant Universe: Superstrings, Hidden Dimensions, and the Quest for the Ultimate Theory
2153:. Some of the differences between real valued and complex valued wave interference include: 6836: 6765: 6710: 6440: 6263: 6221: 5915: 5871: 5832: 5751: 5612: 5592: 5476:. When the metre was defined as the distance between two marks on a platinum-iridium bar, 3824: 3736: 3462: 3419: 3128: 2157:
The interference involves different types of mathematical functions: A classical wave is a
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are combined by adding their intensities or displacements with due consideration for their
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where the path difference is an odd multiple of λ/2, the waves reinforce. At locations
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In addition to classical wave model for understanding optical interference, quantum
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when it is in situation B plus an extra term. This extra term, which is called the
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which means "hit or strike", and was used in the context of wave superposition by
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are generally considered to be the first strong evidence against the theory of a
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Any two different real waves in the same medium interfere; complex waves must be
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Pfleegor, R. L.; Mandel, L. (1967). "Interference of independent photon beams".
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is an instrument for measuring the physical characteristics of sound waves in a
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correspond to distinct situations A and B. When this is the case, the equation
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is known as the fringe spacing. The fringe spacing increases with increase in
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This can be expressed in terms of the intensities of the individual waves as
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Bach, Roger; Pope, Damian; Liou, Sy-Hwang; Batelaan, Herman (2013-03-13).
283:(180°), whereas destructive interference occurs when the difference is an 6666: 5884: 5709: 5627: 5497: 5490: 5342: 5254: 4154: 4058: 4013: 3948: 3903: 3278: 3217: 3205:
In wavefront-division systems, the wave is divided in space—examples are
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bottom plate undergoes a 180° phase reversal. As a result, at locations
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when it is in situation A plus the probability of finding the object at
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respective paths. Prime examples of light interference are the famous
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Easy JavaScript Simulation Model of One Dimensional Wave Interference
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and Benoît used interferometry to measure the wavelength of the red
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is produced. This combination tone can also be referred to as a
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can be directly observed: they are real-valued wave functions;
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one merely assumes the converse, then multiplies both sides by
1980:{\displaystyle \varphi _{n}-\varphi _{n-1}={\frac {2\pi }{N}}.} 1799: 608: 26:"Interference pattern" redirects here. For Moiré patterns, see 4362:{\displaystyle P(x)=|\Psi (x,t)|^{2}=\Psi ^{*}(x,t)\Psi (x,t)} 2446:{\displaystyle U_{2}(\mathbf {r} ,t)=A_{2}(\mathbf {r} )e^{i}} 2333:{\displaystyle U_{1}(\mathbf {r} ,t)=A_{1}(\mathbf {r} )e^{i}} 6023:
This is Your Brain on Music: The Science of a Human Obsession
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Interference can also be seen in everyday phenomena such as
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Patel, R.; Achamfuo-Yeboah, S.; Light R.; Clark M. (2014).
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spurious interference fringes which can result in errors.
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Interferometry has been used in defining and calibrating
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A simple form of interference pattern is obtained if two
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Interferometry is still fundamental in establishing the
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Phenomenon resulting from the superposition of two waves
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Geometrical arrangement for two plane wave interference
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The best known example of quantum interference is the
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cannot be directly observed: they are complex valued
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It can be seen that the two waves are in phase when
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may be too technical for most readers to understand
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If a 173:as well as in loudspeakers as electrical waves. 5950:, The Feynman Lectures Website, September 2013. 5905: 5903: 1422:Interference fringes in overlapping plane waves 1212:{\displaystyle W_{1}+W_{2}=2A\cos(kx-\omega t)} 1136:{\displaystyle \left|\cos(\varphi /2)\right|=1} 5822: 2459:represents the magnitude of the displacement, 1755: 19:For interference in radio communications, see 6144: 5966:"Controlled double-slit electron diffraction" 5952:"The Feynman Lectures on Physics, Volume III" 5496:Interferometry is used in the calibration of 4131: 3127:Classically the two waves must have the same 607:is the phase difference between the waves in 402:{\displaystyle W_{1}(x,t)=A\cos(kx-\omega t)} 325: 221:Interference of waves from two point sources. 5900: 4944:is the probability of finding the object at 3359: 3333: 3228:Iridiscence caused by thin-film interference 3202:are examples of amplitude-division systems. 3143: 2179: 1435:, then the relative phase changes along the 6117:Flash animations demonstrating interference 6039: 5412:beating starts to sound like a note, and a 6151: 6137: 6102:Expressions of position and fringe spacing 5570: 4204:for a quantum mechanical object. Then the 4138: 4124: 3263:White light interference in a soap bubble. 1405: 271:Constructive interference occurs when the 5981: 5919:. Cambridge: Cambridge University Press. 5883: 5802:. Cambridge: Cambridge University Press. 5429: 4158: 2740: 1439:-axis. The phase difference at the point 1345: 1286: 1276: 1269: 1259: 80:Learn how and when to remove this message 64:, without removing the technical details. 5909: 5517: 2474:The displacement of the summed waves is 2183: 2102:{\displaystyle e^{i{\frac {2\pi }{N}}}.} 1759: 1417: 1409: 261: 224: 216: 208: 91: 6020: 5737:10.1093/gmo/9781561592630.article.20622 5507: 5500:(called gauge blocks in the US) and in 3268: 3181: 2188:Creation of interference fringes by an 1599:and are half a cycle out of phase when 32:Interference pattern (electromyography) 6923: 6045: 5749: 1356:, so the sum of the two waves is zero 6158: 6132: 5797: 5724: 3239:Smartphone with iridescent back panel 615:and add: the sum of the two waves is 62:make it understandable to non-experts 5860:"Widefield two laser interferometry" 4236:of observing the object at position 1349:{\displaystyle \cos(\varphi /2)=0\,} 36: 3190:In an amplitude-division system, a 275:difference between the waves is an 244:principle of superposition of waves 13: 6055:. New York: W.W. Norton. pp.  5307: 5265: 5180: 5135: 5079: 5054: 5026: 4996: 4890: 4862: 4840: 4799: 4757: 4705: 4680: 4652: 4622: 4579: 4534: 4495: 4434: 4406: 4384: 4341: 4317: 4283: 4168: 3670:Sum-over-histories (path integral) 3356: 3330: 3286:Part of a series of articles about 3207:Young's double slit interferometer 1835:{\displaystyle Ae^{i\varphi _{n}}} 1802:, each wave can be represented as 1452: 14: 6947: 6090: 5118:in the above equation. As in the 3307: 1779: 6905: 6904: 3256: 3244: 3232: 3095: 3071: 3039: 3018: 2989: 2965: 2941: 2900: 2876: 2846: 2825: 2798: 2769: 2727: 2700: 2680: 2622: 2590: 2552: 2520: 2490: 2422: 2390: 2360: 2309: 2277: 2247: 459:{\displaystyle k=2\pi /\lambda } 322:also demonstrate interference. 41: 6081:Geometrical and Physical Optics 6073: 6014: 5348: 5119: 96:The interference of two waves. 6854:Relativistic quantum mechanics 5933: 5851: 5816: 5791: 5778: 5743: 5718: 5701: 5334:{\displaystyle \Psi _{B}(x,t)} 5328: 5316: 5292:{\displaystyle \Psi _{A}(x,t)} 5286: 5274: 5206: 5201: 5189: 5175: 5161: 5156: 5144: 5130: 5105: 5093: 5075: 5063: 5047: 5035: 5022: 5010: 4911: 4899: 4883: 4871: 4855: 4843: 4826:{\displaystyle \Psi _{B}(x,t)} 4820: 4808: 4784:{\displaystyle \Psi _{A}(x,t)} 4778: 4766: 4734: 4731: 4719: 4701: 4689: 4673: 4661: 4648: 4636: 4618: 4605: 4600: 4588: 4574: 4560: 4555: 4543: 4529: 4515: 4510: 4498: 4491: 4484: 4478: 4455: 4443: 4427: 4415: 4399: 4387: 4356: 4344: 4338: 4326: 4303: 4298: 4286: 4279: 4272: 4266: 4223: 4217: 4183: 4171: 3820:Relativistic quantum mechanics 3352: 3345: 3326: 3102: 3099: 3091: 3075: 3067: 3054: 3043: 3035: 3022: 3014: 2993: 2985: 2969: 2961: 2945: 2937: 2907: 2904: 2896: 2880: 2872: 2859: 2850: 2842: 2829: 2821: 2802: 2794: 2773: 2765: 2737: 2723: 2710: 2696: 2684: 2676: 2658:The intensity of the light at 2638: 2626: 2618: 2605: 2594: 2586: 2568: 2556: 2548: 2535: 2524: 2516: 2500: 2486: 2438: 2426: 2418: 2405: 2394: 2386: 2370: 2356: 2325: 2313: 2305: 2292: 2281: 2273: 2257: 2243: 1336: 1322: 1206: 1188: 1119: 1105: 726:{\displaystyle W_{1}+W_{2}=A.} 717: 714: 690: 678: 660: 651: 574: 550: 535: 523: 495:{\displaystyle \omega =2\pi f} 396: 378: 363: 351: 250:at that point is equal to the 1: 6832:Quantum statistical mechanics 6609:Quantum differential calculus 6531:Delayed-choice quantum eraser 6314:Symmetry in quantum mechanics 5992:10.1088/1367-2630/15/3/033018 5976:(3). IOP Publishing: 033018. 5694: 5502:coordinate-measuring machines 5493:chain in length measurement. 3860:Quantum statistical mechanics 2130:Complex valued wave functions 1395:{\displaystyle W_{1}+W_{2}=0} 204: 124:is a phenomenon in which two 5683:Rayleigh roughness criterion 5542:In 1946, a technique called 2124:interference vs. diffraction 1745:, and with decreasing angle 737:for the sum of two cosines: 176: 30:. For the medical term, see 21:Interference (communication) 7: 6634:Quantum stochastic calculus 6624:Quantum measurement problem 6546:Mach–Zehnder interferometer 6021:Levitin, Daniel J. (2006). 5605: 5544:astronomical interferometry 5514:Astronomical interferometer 5459:Michelson–Morley experiment 5388:as a periodic variation in 3830:Quantum information science 3200:Mach–Zehnder interferometer 1756:Between two spherical waves 102:(constructive interference) 10: 6952: 5725:Jones, Peter Ward (2001). 5511: 5433: 5422: 5357: 4189:{\displaystyle \Psi (x,t)} 3272: 2113:Fabry–PĂ©rot interferometer 989:{\displaystyle \varphi /2} 326:Real-valued wave functions 193:which means "between" and 110:(destructive interference) 25: 18: 6900: 6862: 6814: 6694:Quantum complexity theory 6672:Quantum cellular automata 6647: 6579: 6513: 6426: 6390: 6377:Path integral formulation 6344: 6209: 6166: 6083:, 1968, Longmans, London. 5762:10.1007/978-3-0348-8652-9 5530:formed from many smaller 4986:quantum interference term 3162:successful applications. 3144:Light source requirements 2463:represents the phase and 2180:Optical wave interference 1001:Constructive interference 140:constructive interference 6761:Quantum machine learning 6741:Quantum key distribution 6731:Quantum image processing 6721:Quantum error correction 6571:Wheeler's delayed choice 5845:10.1103/physrev.159.1084 5711:Young, Thomas, 1773-1829 5638:Interference lithography 5396:of the two frequencies. 3865:Quantum machine learning 3618:Wheeler's delayed-choice 3196:Michelson interferometer 2126:for further discussion. 1222:Destructive interference 600:{\displaystyle \varphi } 309:anti-reflective coatings 146:destructive interference 6677:Quantum finite automata 5728:Oxford University Press 5643:Interference visibility 5577:acoustic interferometer 5571:Acoustic interferometry 5353: 5299:and the other becomes 4155:wave-behavior of matter 3575:Leggett–Garg inequality 1406:Between two plane waves 429:is the peak amplitude, 6781:Quantum neural network 6025:. Dutton. p. 22. 5970:New Journal of Physics 5750:Kipnis, Nahum (1991). 5678:Thin-film interference 5663:Multipath interference 5539: 5436:Optical interferometry 5430:Optical interferometry 5380:of slightly different 5335: 5293: 5253:. In this experiment, 5251:double-slit experiment 5240: 5220: 5112: 4978: 4958: 4938: 4918: 4827: 4785: 4741: 4462: 4363: 4250: 4230: 4190: 3366: 3275:Double-slit experiment 3112: 2917: 2650: 2447: 2334: 2210: 2155: 2103: 2056: 2022: 1981: 1914: 1882: 1856: 1836: 1765: 1724: 1671: 1591: 1516: 1423: 1415: 1396: 1350: 1303: 1213: 1137: 1081: 990: 962: 842: 735:trigonometric identity 727: 611:. The two waves will 601: 581: 496: 460: 423: 403: 301:double-slit experiment 268: 239: 222: 214: 143:) or lower amplitude ( 113: 6806:Quantum teleportation 6334:Wave–particle duality 5913:; Wolf, Emil (1999). 5798:Steel, W. H. (1986). 5528:interferometric array 5521: 5448:wave–particle duality 5336: 5294: 5241: 5221: 5113: 4979: 4959: 4939: 4919: 4828: 4786: 4742: 4463: 4364: 4251: 4231: 4191: 3560:Elitzur–Vaidman 3550:Davisson–Germer 3367: 3222:structural coloration 3113: 2918: 2651: 2448: 2335: 2187: 2104: 2057: 1996: 1982: 1915: 1913:{\displaystyle n=N-1} 1883: 1857: 1837: 1763: 1725: 1672: 1592: 1517: 1421: 1413: 1397: 1351: 1304: 1214: 1138: 1082: 991: 963: 843: 728: 602: 582: 497: 461: 424: 404: 265: 237: 220: 212: 95: 6837:Quantum field theory 6766:Quantum metamaterial 6711:Quantum cryptography 6441:Consistent histories 5916:Principles of Optics 5885:10.1364/OE.22.027094 5613:Active noise control 5508:Radio interferometry 5376:pattern between two 5303: 5261: 5230: 5126: 4992: 4968: 4948: 4928: 4837: 4795: 4753: 4472: 4381: 4375:linear superposition 4260: 4240: 4229:{\displaystyle P(x)} 4211: 4202:Schrödinger equation 4165: 4159:optical interference 4151:Quantum interference 3825:Quantum field theory 3737:Consistent histories 3374:Schrödinger equation 3301: 3269:Quantum interference 3182:Optical arrangements 2931: 2670: 2480: 2343: 2230: 2207:interference fringes 2068: 1993: 1924: 1892: 1866: 1846: 1806: 1686: 1605: 1530: 1449: 1360: 1313: 1232: 1147: 1091: 1011: 972: 852: 848:this can be written 741: 619: 591: 510: 474: 433: 413: 338: 185:is derived from the 6822:Quantum fluctuation 6791:Quantum programming 6751:Quantum logic gates 6736:Quantum information 6716:Quantum electronics 6191:Classical mechanics 5876:2014OExpr..2227094P 5870:(22): 27094–27101. 5837:1967PhRv..159.1084P 5673:Optical path length 5623:Coherence (physics) 5559:, or other type of 5534:, like many larger 5463:luminiferous aether 5457:The results of the 5418:missing fundamental 5120:classical wave case 5092: 5009: 4718: 4635: 4371:complex conjugation 3613:Stern–Gerlach 3410:Classical mechanics 3159:mercury-vapor lamps 2793: 2764: 2120:diffraction grating 1881:{\displaystyle n=0} 1793:diffraction grating 163:surface water waves 6875:in popular culture 6657:Quantum algorithms 6505:Von Neumann–Wigner 6485:Objective collapse 6196:Old quantum theory 6122:2009-06-24 at the 5565:Aperture synthesis 5540: 5467:special relativity 5392:whose rate is the 5331: 5289: 5236: 5216: 5108: 5078: 4995: 4974: 4954: 4934: 4914: 4823: 4781: 4737: 4704: 4621: 4458: 4369:where * indicates 4359: 4246: 4226: 4186: 3801:Von Neumann–Wigner 3781:Objective-collapse 3580:Mach–Zehnder 3570:Leggett inequality 3565:Franck–Hertz 3415:Old quantum theory 3362: 3134:polarization state 3108: 2913: 2779: 2750: 2646: 2443: 2330: 2211: 2099: 2052: 1977: 1910: 1878: 1852: 1832: 1766: 1720: 1667: 1587: 1512: 1424: 1416: 1392: 1346: 1299: 1209: 1133: 1077: 986: 958: 838: 723: 597: 577: 492: 456: 419: 399: 269: 240: 223: 215: 114: 6918: 6917: 6892:Quantum mysticism 6870:Schrödinger's cat 6801:Quantum simulator 6771:Quantum metrology 6699:Quantum computing 6662:Quantum amplifier 6639:Quantum spacetime 6604:Quantum cosmology 6594:Quantum chemistry 6309:Scattering theory 6257:Zero-point energy 6252:Degenerate levels 6160:Quantum mechanics 6066:978-0-393-04688-5 5771:978-3-0348-9717-4 5633:Haidinger fringes 5561:transmission line 5239:{\displaystyle x} 4977:{\displaystyle x} 4957:{\displaystyle x} 4937:{\displaystyle x} 4249:{\displaystyle x} 4148: 4147: 3855:Scattering theory 3835:Quantum computing 3608:Schrödinger's cat 3540:Bell's inequality 3348: 3323: 3292:Quantum mechanics 3046: 2469:angular frequency 2092: 1972: 1855:{\displaystyle N} 1718: 1659: 1643: 1627: 1552: 1507: 1477: 948: 905: 829: 797: 504:angular frequency 422:{\displaystyle A} 235: 90: 89: 82: 6943: 6908: 6907: 6619:Quantum geometry 6614:Quantum dynamics 6471:Superdeterminism 6367:Matrix mechanics 6222:Bra–ket notation 6153: 6146: 6139: 6130: 6129: 6084: 6077: 6071: 6070: 6043: 6037: 6036: 6018: 6012: 6011: 5985: 5961: 5955: 5954:(online edition) 5937: 5931: 5930: 5907: 5898: 5897: 5887: 5855: 5849: 5848: 5831:(5): 1084–1088. 5820: 5814: 5813: 5795: 5789: 5784:Ockenga, Wymke. 5782: 5776: 5775: 5747: 5741: 5740: 5722: 5716: 5715: 5705: 5618:Beat (acoustics) 5583:or liquid, such 5536:radio telescopes 5524:Very Large Array 5474:length standards 5465:and in favor of 5414:combination tone 5360:Beat (acoustics) 5340: 5338: 5337: 5332: 5315: 5314: 5298: 5296: 5295: 5290: 5273: 5272: 5245: 5243: 5242: 5237: 5225: 5223: 5222: 5217: 5215: 5214: 5209: 5188: 5187: 5178: 5170: 5169: 5164: 5143: 5142: 5133: 5117: 5115: 5114: 5109: 5091: 5086: 5062: 5061: 5034: 5033: 5008: 5003: 4983: 4981: 4980: 4975: 4963: 4961: 4960: 4955: 4943: 4941: 4940: 4935: 4923: 4921: 4920: 4915: 4898: 4897: 4870: 4869: 4832: 4830: 4829: 4824: 4807: 4806: 4790: 4788: 4787: 4782: 4765: 4764: 4746: 4744: 4743: 4738: 4717: 4712: 4688: 4687: 4660: 4659: 4634: 4629: 4614: 4613: 4608: 4587: 4586: 4577: 4569: 4568: 4563: 4542: 4541: 4532: 4524: 4523: 4518: 4494: 4467: 4465: 4464: 4459: 4442: 4441: 4414: 4413: 4368: 4366: 4365: 4360: 4325: 4324: 4312: 4311: 4306: 4282: 4255: 4253: 4252: 4247: 4235: 4233: 4232: 4227: 4200:solution of the 4195: 4193: 4192: 4187: 4140: 4133: 4126: 3767:Superdeterminism 3420:Bra–ket notation 3371: 3369: 3368: 3363: 3355: 3350: 3349: 3341: 3329: 3324: 3322: 3311: 3283: 3282: 3260: 3248: 3236: 3123: 3117: 3115: 3114: 3109: 3098: 3090: 3089: 3074: 3066: 3065: 3047: 3042: 3034: 3033: 3021: 3013: 3012: 3003: 2992: 2984: 2983: 2968: 2960: 2959: 2944: 2922: 2920: 2919: 2914: 2903: 2895: 2894: 2879: 2871: 2870: 2849: 2841: 2840: 2828: 2820: 2819: 2801: 2792: 2787: 2772: 2763: 2758: 2730: 2722: 2721: 2703: 2683: 2663: 2655: 2653: 2652: 2647: 2642: 2641: 2625: 2617: 2616: 2593: 2585: 2584: 2572: 2571: 2555: 2547: 2546: 2523: 2515: 2514: 2493: 2466: 2462: 2458: 2452: 2450: 2449: 2444: 2442: 2441: 2425: 2417: 2416: 2393: 2385: 2384: 2363: 2355: 2354: 2339: 2337: 2336: 2331: 2329: 2328: 2312: 2304: 2303: 2280: 2272: 2271: 2250: 2242: 2241: 2223: 2108: 2106: 2105: 2100: 2095: 2094: 2093: 2088: 2080: 2061: 2059: 2058: 2053: 2045: 2044: 2043: 2042: 2021: 2010: 1986: 1984: 1983: 1978: 1973: 1968: 1960: 1955: 1954: 1936: 1935: 1919: 1917: 1916: 1911: 1887: 1885: 1884: 1879: 1861: 1859: 1858: 1853: 1841: 1839: 1838: 1833: 1831: 1830: 1829: 1828: 1748: 1740: 1729: 1727: 1726: 1721: 1719: 1717: 1703: 1698: 1697: 1676: 1674: 1673: 1668: 1660: 1652: 1644: 1636: 1628: 1623: 1609: 1596: 1594: 1593: 1588: 1553: 1548: 1534: 1521: 1519: 1518: 1513: 1508: 1503: 1483: 1478: 1473: 1462: 1401: 1399: 1398: 1393: 1385: 1384: 1372: 1371: 1355: 1353: 1352: 1347: 1332: 1308: 1306: 1305: 1300: 1227: 1218: 1216: 1215: 1210: 1172: 1171: 1159: 1158: 1142: 1140: 1139: 1134: 1126: 1122: 1115: 1086: 1084: 1083: 1078: 1006: 995: 993: 992: 987: 982: 967: 965: 964: 959: 954: 950: 949: 941: 910: 906: 898: 877: 876: 864: 863: 847: 845: 844: 839: 834: 830: 825: 814: 802: 798: 793: 782: 732: 730: 729: 724: 644: 643: 631: 630: 606: 604: 603: 598: 586: 584: 583: 578: 522: 521: 501: 499: 498: 493: 465: 463: 462: 457: 452: 428: 426: 425: 420: 408: 406: 405: 400: 350: 349: 290: 282: 236: 134:phase difference 85: 78: 74: 71: 65: 45: 44: 37: 6951: 6950: 6946: 6945: 6944: 6942: 6941: 6940: 6921: 6920: 6919: 6914: 6896: 6882:Wigner's friend 6858: 6849:Quantum gravity 6810: 6796:Quantum sensing 6776:Quantum network 6756:Quantum machine 6726:Quantum imaging 6689:Quantum circuit 6684:Quantum channel 6643: 6589:Quantum biology 6575: 6551:Elitzur–Vaidman 6526:Davisson–Germer 6509: 6461:Hidden-variable 6451:de Broglie–Bohm 6428:Interpretations 6422: 6386: 6340: 6227:Complementarity 6205: 6162: 6157: 6124:Wayback Machine 6093: 6088: 6087: 6079:RS Longhurst, 6078: 6074: 6067: 6044: 6040: 6033: 6019: 6015: 5962: 5958: 5938: 5934: 5927: 5908: 5901: 5856: 5852: 5821: 5817: 5810: 5796: 5792: 5783: 5779: 5772: 5748: 5744: 5723: 5719: 5706: 5702: 5697: 5692: 5608: 5602: 5573: 5516: 5510: 5452:Richard Feynman 5438: 5432: 5427: 5362: 5356: 5351: 5310: 5306: 5304: 5301: 5300: 5268: 5264: 5262: 5259: 5258: 5231: 5228: 5227: 5210: 5205: 5204: 5183: 5179: 5174: 5165: 5160: 5159: 5138: 5134: 5129: 5127: 5124: 5123: 5087: 5082: 5057: 5053: 5029: 5025: 5004: 4999: 4993: 4990: 4989: 4969: 4966: 4965: 4949: 4946: 4945: 4929: 4926: 4925: 4893: 4889: 4865: 4861: 4838: 4835: 4834: 4802: 4798: 4796: 4793: 4792: 4760: 4756: 4754: 4751: 4750: 4713: 4708: 4683: 4679: 4655: 4651: 4630: 4625: 4609: 4604: 4603: 4582: 4578: 4573: 4564: 4559: 4558: 4537: 4533: 4528: 4519: 4514: 4513: 4490: 4473: 4470: 4469: 4437: 4433: 4409: 4405: 4382: 4379: 4378: 4320: 4316: 4307: 4302: 4301: 4278: 4261: 4258: 4257: 4241: 4238: 4237: 4212: 4209: 4208: 4166: 4163: 4162: 4153:– the observed 4144: 4115: 4114: 4113: 3878: 3870: 3869: 3815: 3814:Advanced topics 3807: 3806: 3805: 3757:Hidden-variable 3747:de Broglie–Bohm 3726: 3724:Interpretations 3716: 3715: 3714: 3684: 3676: 3675: 3674: 3632: 3624: 3623: 3622: 3589: 3545:CHSH inequality 3534: 3526: 3525: 3524: 3453:Complementarity 3447: 3439: 3438: 3437: 3405: 3376: 3351: 3340: 3339: 3325: 3315: 3310: 3302: 3299: 3298: 3281: 3271: 3264: 3261: 3252: 3249: 3240: 3237: 3184: 3146: 3121: 3094: 3085: 3081: 3070: 3061: 3057: 3038: 3029: 3025: 3017: 3008: 3004: 3002: 2988: 2979: 2975: 2964: 2955: 2951: 2940: 2932: 2929: 2928: 2899: 2890: 2886: 2875: 2866: 2862: 2845: 2836: 2832: 2824: 2815: 2811: 2797: 2788: 2783: 2768: 2759: 2754: 2726: 2717: 2713: 2699: 2679: 2671: 2668: 2667: 2659: 2621: 2612: 2608: 2601: 2597: 2589: 2580: 2576: 2551: 2542: 2538: 2531: 2527: 2519: 2510: 2506: 2489: 2481: 2478: 2477: 2467:represents the 2464: 2460: 2456: 2421: 2412: 2408: 2401: 2397: 2389: 2380: 2376: 2359: 2350: 2346: 2344: 2341: 2340: 2308: 2299: 2295: 2288: 2284: 2276: 2267: 2263: 2246: 2237: 2233: 2231: 2228: 2227: 2219: 2182: 2132: 2081: 2079: 2075: 2071: 2069: 2066: 2065: 2038: 2034: 2030: 2026: 2011: 2000: 1994: 1991: 1990: 1961: 1959: 1944: 1940: 1931: 1927: 1925: 1922: 1921: 1893: 1890: 1889: 1867: 1864: 1863: 1847: 1844: 1843: 1824: 1820: 1816: 1812: 1807: 1804: 1803: 1782: 1758: 1746: 1738: 1733: 1707: 1702: 1693: 1689: 1687: 1684: 1683: 1651: 1635: 1610: 1608: 1606: 1603: 1602: 1535: 1533: 1531: 1528: 1527: 1484: 1482: 1463: 1461: 1450: 1447: 1446: 1408: 1380: 1376: 1367: 1363: 1361: 1358: 1357: 1328: 1314: 1311: 1310: 1233: 1230: 1229: 1225: 1167: 1163: 1154: 1150: 1148: 1145: 1144: 1111: 1098: 1094: 1092: 1089: 1088: 1012: 1009: 1008: 1004: 978: 973: 970: 969: 940: 921: 917: 897: 893: 872: 868: 859: 855: 853: 850: 849: 815: 813: 809: 783: 781: 777: 742: 739: 738: 639: 635: 626: 622: 620: 617: 616: 592: 589: 588: 517: 513: 511: 508: 507: 475: 472: 471: 448: 434: 431: 430: 414: 411: 410: 345: 341: 339: 336: 335: 328: 313:interferometers 288: 280: 225: 207: 179: 86: 75: 69: 66: 58:help improve it 55: 46: 42: 35: 24: 17: 12: 11: 5: 6949: 6939: 6938: 6936:Wave mechanics 6933: 6916: 6915: 6913: 6912: 6901: 6898: 6897: 6895: 6894: 6889: 6884: 6879: 6878: 6877: 6866: 6864: 6860: 6859: 6857: 6856: 6851: 6846: 6845: 6844: 6834: 6829: 6827:Casimir effect 6824: 6818: 6816: 6812: 6811: 6809: 6808: 6803: 6798: 6793: 6788: 6786:Quantum optics 6783: 6778: 6773: 6768: 6763: 6758: 6753: 6748: 6743: 6738: 6733: 6728: 6723: 6718: 6713: 6708: 6707: 6706: 6696: 6691: 6686: 6681: 6680: 6679: 6669: 6664: 6659: 6653: 6651: 6645: 6644: 6642: 6641: 6636: 6631: 6626: 6621: 6616: 6611: 6606: 6601: 6596: 6591: 6585: 6583: 6577: 6576: 6574: 6573: 6568: 6563: 6561:Quantum eraser 6558: 6553: 6548: 6543: 6538: 6533: 6528: 6523: 6517: 6515: 6511: 6510: 6508: 6507: 6502: 6497: 6492: 6487: 6482: 6477: 6476: 6475: 6474: 6473: 6458: 6453: 6448: 6443: 6438: 6432: 6430: 6424: 6423: 6421: 6420: 6415: 6410: 6405: 6400: 6394: 6392: 6388: 6387: 6385: 6384: 6379: 6374: 6369: 6364: 6359: 6354: 6348: 6346: 6342: 6341: 6339: 6338: 6337: 6336: 6331: 6321: 6316: 6311: 6306: 6301: 6296: 6291: 6286: 6281: 6276: 6271: 6266: 6261: 6260: 6259: 6254: 6249: 6244: 6234: 6232:Density matrix 6229: 6224: 6219: 6213: 6211: 6207: 6206: 6204: 6203: 6198: 6193: 6188: 6187: 6186: 6176: 6170: 6168: 6164: 6163: 6156: 6155: 6148: 6141: 6133: 6127: 6126: 6114: 6109: 6104: 6099: 6092: 6091:External links 6089: 6086: 6085: 6072: 6065: 6038: 6032:978-0525949695 6031: 6013: 5956: 5932: 5925: 5899: 5864:Optics Express 5850: 5815: 5808: 5800:Interferometry 5790: 5786:Phase contrast 5777: 5770: 5742: 5717: 5699: 5698: 5696: 5693: 5691: 5690: 5685: 5680: 5675: 5670: 5668:Newton's rings 5665: 5660: 5655: 5653:Lloyd's Mirror 5650: 5648:Interferometer 5645: 5640: 5635: 5630: 5625: 5620: 5615: 5609: 5607: 5604: 5595:. A vibrating 5587:, wavelength, 5572: 5569: 5512:Main article: 5509: 5506: 5434:Main article: 5431: 5428: 5425:Interferometry 5423:Main article: 5358:Main article: 5355: 5352: 5350: 5347: 5330: 5327: 5324: 5321: 5318: 5313: 5309: 5288: 5285: 5282: 5279: 5276: 5271: 5267: 5235: 5213: 5208: 5203: 5200: 5197: 5194: 5191: 5186: 5182: 5177: 5173: 5168: 5163: 5158: 5155: 5152: 5149: 5146: 5141: 5137: 5132: 5107: 5104: 5101: 5098: 5095: 5090: 5085: 5081: 5077: 5074: 5071: 5068: 5065: 5060: 5056: 5052: 5049: 5046: 5043: 5040: 5037: 5032: 5028: 5024: 5021: 5018: 5015: 5012: 5007: 5002: 4998: 4973: 4953: 4933: 4913: 4910: 4907: 4904: 4901: 4896: 4892: 4888: 4885: 4882: 4879: 4876: 4873: 4868: 4864: 4860: 4857: 4854: 4851: 4848: 4845: 4842: 4822: 4819: 4816: 4813: 4810: 4805: 4801: 4780: 4777: 4774: 4771: 4768: 4763: 4759: 4736: 4733: 4730: 4727: 4724: 4721: 4716: 4711: 4707: 4703: 4700: 4697: 4694: 4691: 4686: 4682: 4678: 4675: 4672: 4669: 4666: 4663: 4658: 4654: 4650: 4647: 4644: 4641: 4638: 4633: 4628: 4624: 4620: 4617: 4612: 4607: 4602: 4599: 4596: 4593: 4590: 4585: 4581: 4576: 4572: 4567: 4562: 4557: 4554: 4551: 4548: 4545: 4540: 4536: 4531: 4527: 4522: 4517: 4512: 4509: 4506: 4503: 4500: 4497: 4493: 4489: 4486: 4483: 4480: 4477: 4457: 4454: 4451: 4448: 4445: 4440: 4436: 4432: 4429: 4426: 4423: 4420: 4417: 4412: 4408: 4404: 4401: 4398: 4395: 4392: 4389: 4386: 4358: 4355: 4352: 4349: 4346: 4343: 4340: 4337: 4334: 4331: 4328: 4323: 4319: 4315: 4310: 4305: 4300: 4297: 4294: 4291: 4288: 4285: 4281: 4277: 4274: 4271: 4268: 4265: 4245: 4225: 4222: 4219: 4216: 4185: 4182: 4179: 4176: 4173: 4170: 4146: 4145: 4143: 4142: 4135: 4128: 4120: 4117: 4116: 4112: 4111: 4106: 4101: 4096: 4091: 4086: 4081: 4076: 4071: 4066: 4061: 4056: 4051: 4046: 4041: 4036: 4031: 4026: 4021: 4016: 4011: 4006: 4001: 3996: 3991: 3986: 3981: 3976: 3971: 3966: 3961: 3956: 3951: 3946: 3941: 3936: 3931: 3926: 3921: 3916: 3911: 3906: 3901: 3896: 3891: 3886: 3880: 3879: 3876: 3875: 3872: 3871: 3868: 3867: 3862: 3857: 3852: 3850:Density matrix 3847: 3842: 3837: 3832: 3827: 3822: 3816: 3813: 3812: 3809: 3808: 3804: 3803: 3798: 3793: 3788: 3783: 3778: 3773: 3772: 3771: 3770: 3769: 3754: 3749: 3744: 3739: 3734: 3728: 3727: 3722: 3721: 3718: 3717: 3713: 3712: 3707: 3702: 3697: 3692: 3686: 3685: 3682: 3681: 3678: 3677: 3673: 3672: 3667: 3662: 3657: 3652: 3647: 3641: 3640: 3639: 3633: 3630: 3629: 3626: 3625: 3621: 3620: 3615: 3610: 3604: 3603: 3602: 3601: 3600: 3598:Delayed-choice 3593:Quantum eraser 3588: 3587: 3582: 3577: 3572: 3567: 3562: 3557: 3552: 3547: 3542: 3536: 3535: 3532: 3531: 3528: 3527: 3523: 3522: 3521: 3520: 3510: 3505: 3500: 3495: 3490: 3485: 3483:Quantum number 3480: 3475: 3470: 3465: 3460: 3455: 3449: 3448: 3445: 3444: 3441: 3440: 3436: 3435: 3430: 3424: 3423: 3422: 3417: 3412: 3406: 3403: 3402: 3399: 3398: 3397: 3396: 3391: 3386: 3378: 3377: 3372: 3361: 3358: 3354: 3347: 3344: 3338: 3335: 3332: 3328: 3321: 3318: 3314: 3309: 3306: 3295: 3294: 3288: 3287: 3270: 3267: 3266: 3265: 3262: 3255: 3253: 3250: 3243: 3241: 3238: 3231: 3229: 3211:Lloyd's mirror 3183: 3180: 3145: 3142: 3107: 3104: 3101: 3097: 3093: 3088: 3084: 3080: 3077: 3073: 3069: 3064: 3060: 3056: 3053: 3050: 3045: 3041: 3037: 3032: 3028: 3024: 3020: 3016: 3011: 3007: 3001: 2998: 2995: 2991: 2987: 2982: 2978: 2974: 2971: 2967: 2963: 2958: 2954: 2950: 2947: 2943: 2939: 2936: 2912: 2909: 2906: 2902: 2898: 2893: 2889: 2885: 2882: 2878: 2874: 2869: 2865: 2861: 2858: 2855: 2852: 2848: 2844: 2839: 2835: 2831: 2827: 2823: 2818: 2814: 2810: 2807: 2804: 2800: 2796: 2791: 2786: 2782: 2778: 2775: 2771: 2767: 2762: 2757: 2753: 2749: 2746: 2743: 2739: 2736: 2733: 2729: 2725: 2720: 2716: 2712: 2709: 2706: 2702: 2698: 2695: 2692: 2689: 2686: 2682: 2678: 2675: 2645: 2640: 2637: 2634: 2631: 2628: 2624: 2620: 2615: 2611: 2607: 2604: 2600: 2596: 2592: 2588: 2583: 2579: 2575: 2570: 2567: 2564: 2561: 2558: 2554: 2550: 2545: 2541: 2537: 2534: 2530: 2526: 2522: 2518: 2513: 2509: 2505: 2502: 2499: 2496: 2492: 2488: 2485: 2440: 2437: 2434: 2431: 2428: 2424: 2420: 2415: 2411: 2407: 2404: 2400: 2396: 2392: 2388: 2383: 2379: 2375: 2372: 2369: 2366: 2362: 2358: 2353: 2349: 2327: 2324: 2321: 2318: 2315: 2311: 2307: 2302: 2298: 2294: 2291: 2287: 2283: 2279: 2275: 2270: 2266: 2262: 2259: 2256: 2253: 2249: 2245: 2240: 2236: 2181: 2178: 2177: 2176: 2173: 2166: 2151:wave functions 2131: 2128: 2098: 2091: 2087: 2084: 2078: 2074: 2051: 2048: 2041: 2037: 2033: 2029: 2025: 2020: 2017: 2014: 2009: 2006: 2003: 1999: 1976: 1971: 1967: 1964: 1958: 1953: 1950: 1947: 1943: 1939: 1934: 1930: 1909: 1906: 1903: 1900: 1897: 1877: 1874: 1871: 1851: 1827: 1823: 1819: 1815: 1811: 1781: 1780:Multiple beams 1778: 1757: 1754: 1736: 1716: 1713: 1710: 1706: 1701: 1696: 1692: 1666: 1663: 1658: 1655: 1650: 1647: 1642: 1639: 1634: 1631: 1626: 1622: 1619: 1616: 1613: 1586: 1583: 1580: 1577: 1574: 1571: 1568: 1565: 1562: 1559: 1556: 1551: 1547: 1544: 1541: 1538: 1511: 1506: 1502: 1499: 1496: 1493: 1490: 1487: 1481: 1476: 1472: 1469: 1466: 1460: 1457: 1454: 1407: 1404: 1403: 1402: 1391: 1388: 1383: 1379: 1375: 1370: 1366: 1344: 1341: 1338: 1335: 1331: 1327: 1324: 1321: 1318: 1298: 1295: 1292: 1289: 1285: 1282: 1279: 1275: 1272: 1268: 1265: 1262: 1258: 1255: 1252: 1249: 1246: 1243: 1240: 1237: 1219: 1208: 1205: 1202: 1199: 1196: 1193: 1190: 1187: 1184: 1181: 1178: 1175: 1170: 1166: 1162: 1157: 1153: 1132: 1129: 1125: 1121: 1118: 1114: 1110: 1107: 1104: 1101: 1097: 1076: 1073: 1070: 1067: 1064: 1061: 1058: 1055: 1052: 1049: 1046: 1043: 1040: 1037: 1034: 1031: 1028: 1025: 1022: 1019: 1016: 985: 981: 977: 957: 953: 947: 944: 939: 936: 933: 930: 927: 924: 920: 916: 913: 909: 904: 901: 896: 892: 889: 886: 883: 880: 875: 871: 867: 862: 858: 837: 833: 828: 824: 821: 818: 812: 808: 805: 801: 796: 792: 789: 786: 780: 776: 773: 770: 767: 764: 761: 758: 755: 752: 749: 746: 722: 719: 716: 713: 710: 707: 704: 701: 698: 695: 692: 689: 686: 683: 680: 677: 674: 671: 668: 665: 662: 659: 656: 653: 650: 647: 642: 638: 634: 629: 625: 596: 576: 573: 570: 567: 564: 561: 558: 555: 552: 549: 546: 543: 540: 537: 534: 531: 528: 525: 520: 516: 491: 488: 485: 482: 479: 455: 451: 447: 444: 441: 438: 418: 398: 395: 392: 389: 386: 383: 380: 377: 374: 371: 368: 365: 362: 359: 356: 353: 348: 344: 327: 324: 206: 203: 178: 175: 88: 87: 49: 47: 40: 15: 9: 6: 4: 3: 2: 6948: 6937: 6934: 6932: 6929: 6928: 6926: 6911: 6903: 6902: 6899: 6893: 6890: 6888: 6885: 6883: 6880: 6876: 6873: 6872: 6871: 6868: 6867: 6865: 6861: 6855: 6852: 6850: 6847: 6843: 6840: 6839: 6838: 6835: 6833: 6830: 6828: 6825: 6823: 6820: 6819: 6817: 6813: 6807: 6804: 6802: 6799: 6797: 6794: 6792: 6789: 6787: 6784: 6782: 6779: 6777: 6774: 6772: 6769: 6767: 6764: 6762: 6759: 6757: 6754: 6752: 6749: 6747: 6746:Quantum logic 6744: 6742: 6739: 6737: 6734: 6732: 6729: 6727: 6724: 6722: 6719: 6717: 6714: 6712: 6709: 6705: 6702: 6701: 6700: 6697: 6695: 6692: 6690: 6687: 6685: 6682: 6678: 6675: 6674: 6673: 6670: 6668: 6665: 6663: 6660: 6658: 6655: 6654: 6652: 6650: 6646: 6640: 6637: 6635: 6632: 6630: 6627: 6625: 6622: 6620: 6617: 6615: 6612: 6610: 6607: 6605: 6602: 6600: 6599:Quantum chaos 6597: 6595: 6592: 6590: 6587: 6586: 6584: 6582: 6578: 6572: 6569: 6567: 6566:Stern–Gerlach 6564: 6562: 6559: 6557: 6554: 6552: 6549: 6547: 6544: 6542: 6539: 6537: 6534: 6532: 6529: 6527: 6524: 6522: 6519: 6518: 6516: 6512: 6506: 6503: 6501: 6500:Transactional 6498: 6496: 6493: 6491: 6490:Quantum logic 6488: 6486: 6483: 6481: 6478: 6472: 6469: 6468: 6467: 6464: 6463: 6462: 6459: 6457: 6454: 6452: 6449: 6447: 6444: 6442: 6439: 6437: 6434: 6433: 6431: 6429: 6425: 6419: 6416: 6414: 6411: 6409: 6406: 6404: 6401: 6399: 6396: 6395: 6393: 6389: 6383: 6380: 6378: 6375: 6373: 6370: 6368: 6365: 6363: 6360: 6358: 6355: 6353: 6350: 6349: 6347: 6343: 6335: 6332: 6330: 6327: 6326: 6325: 6324:Wave function 6322: 6320: 6317: 6315: 6312: 6310: 6307: 6305: 6302: 6300: 6299:Superposition 6297: 6295: 6294:Quantum state 6292: 6290: 6287: 6285: 6282: 6280: 6277: 6275: 6272: 6270: 6267: 6265: 6262: 6258: 6255: 6253: 6250: 6248: 6247:Excited state 6245: 6243: 6240: 6239: 6238: 6235: 6233: 6230: 6228: 6225: 6223: 6220: 6218: 6215: 6214: 6212: 6208: 6202: 6199: 6197: 6194: 6192: 6189: 6185: 6182: 6181: 6180: 6177: 6175: 6172: 6171: 6169: 6165: 6161: 6154: 6149: 6147: 6142: 6140: 6135: 6134: 6131: 6125: 6121: 6118: 6115: 6113: 6110: 6108: 6105: 6103: 6100: 6098: 6095: 6094: 6082: 6076: 6068: 6062: 6058: 6054: 6053: 6048: 6047:Greene, Brian 6042: 6034: 6028: 6024: 6017: 6009: 6005: 6001: 5997: 5993: 5989: 5984: 5979: 5975: 5971: 5967: 5960: 5953: 5949: 5945: 5941: 5936: 5928: 5926:0-521-64222-1 5922: 5918: 5917: 5912: 5906: 5904: 5895: 5891: 5886: 5881: 5877: 5873: 5869: 5865: 5861: 5854: 5846: 5842: 5838: 5834: 5830: 5826: 5819: 5811: 5809:0-521-31162-4 5805: 5801: 5794: 5787: 5781: 5773: 5767: 5763: 5759: 5755: 5754: 5746: 5738: 5734: 5730: 5729: 5721: 5713: 5712: 5704: 5700: 5689: 5686: 5684: 5681: 5679: 5676: 5674: 5671: 5669: 5666: 5664: 5661: 5659: 5658:MoirĂ© pattern 5656: 5654: 5651: 5649: 5646: 5644: 5641: 5639: 5636: 5634: 5631: 5629: 5626: 5624: 5621: 5619: 5616: 5614: 5611: 5610: 5603: 5600: 5598: 5594: 5590: 5586: 5582: 5578: 5568: 5566: 5562: 5558: 5557:optical fiber 5554: 5550: 5549:coaxial cable 5545: 5537: 5533: 5529: 5525: 5520: 5515: 5505: 5503: 5499: 5494: 5492: 5487: 5483: 5479: 5475: 5470: 5468: 5464: 5460: 5455: 5453: 5449: 5445: 5441: 5437: 5426: 5421: 5419: 5415: 5410: 5406: 5402: 5397: 5395: 5391: 5387: 5383: 5379: 5375: 5371: 5367: 5361: 5346: 5344: 5325: 5322: 5319: 5311: 5283: 5280: 5277: 5269: 5256: 5252: 5247: 5233: 5211: 5198: 5195: 5192: 5184: 5171: 5166: 5153: 5150: 5147: 5139: 5121: 5102: 5099: 5096: 5088: 5083: 5072: 5069: 5066: 5058: 5050: 5044: 5041: 5038: 5030: 5019: 5016: 5013: 5005: 5000: 4987: 4971: 4951: 4931: 4908: 4905: 4902: 4894: 4886: 4880: 4877: 4874: 4866: 4858: 4852: 4849: 4846: 4817: 4814: 4811: 4803: 4775: 4772: 4769: 4761: 4747: 4728: 4725: 4722: 4714: 4709: 4698: 4695: 4692: 4684: 4676: 4670: 4667: 4664: 4656: 4645: 4642: 4639: 4631: 4626: 4615: 4610: 4597: 4594: 4591: 4583: 4570: 4565: 4552: 4549: 4546: 4538: 4525: 4520: 4507: 4504: 4501: 4487: 4481: 4475: 4452: 4449: 4446: 4438: 4430: 4424: 4421: 4418: 4410: 4402: 4396: 4393: 4390: 4377:of two terms 4376: 4372: 4353: 4350: 4347: 4335: 4332: 4329: 4321: 4313: 4308: 4295: 4292: 4289: 4275: 4269: 4263: 4243: 4220: 4214: 4207: 4203: 4199: 4180: 4177: 4174: 4160: 4156: 4152: 4141: 4136: 4134: 4129: 4127: 4122: 4121: 4119: 4118: 4110: 4107: 4105: 4102: 4100: 4097: 4095: 4092: 4090: 4087: 4085: 4082: 4080: 4077: 4075: 4072: 4070: 4067: 4065: 4062: 4060: 4057: 4055: 4052: 4050: 4047: 4045: 4042: 4040: 4037: 4035: 4032: 4030: 4027: 4025: 4022: 4020: 4017: 4015: 4012: 4010: 4007: 4005: 4002: 4000: 3997: 3995: 3992: 3990: 3987: 3985: 3982: 3980: 3977: 3975: 3972: 3970: 3967: 3965: 3962: 3960: 3957: 3955: 3952: 3950: 3947: 3945: 3942: 3940: 3937: 3935: 3932: 3930: 3927: 3925: 3922: 3920: 3917: 3915: 3912: 3910: 3907: 3905: 3902: 3900: 3897: 3895: 3892: 3890: 3887: 3885: 3882: 3881: 3874: 3873: 3866: 3863: 3861: 3858: 3856: 3853: 3851: 3848: 3846: 3843: 3841: 3840:Quantum chaos 3838: 3836: 3833: 3831: 3828: 3826: 3823: 3821: 3818: 3817: 3811: 3810: 3802: 3799: 3797: 3796:Transactional 3794: 3792: 3789: 3787: 3786:Quantum logic 3784: 3782: 3779: 3777: 3774: 3768: 3765: 3764: 3763: 3760: 3759: 3758: 3755: 3753: 3750: 3748: 3745: 3743: 3740: 3738: 3735: 3733: 3730: 3729: 3725: 3720: 3719: 3711: 3708: 3706: 3703: 3701: 3698: 3696: 3693: 3691: 3688: 3687: 3680: 3679: 3671: 3668: 3666: 3663: 3661: 3658: 3656: 3653: 3651: 3648: 3646: 3643: 3642: 3638: 3635: 3634: 3628: 3627: 3619: 3616: 3614: 3611: 3609: 3606: 3605: 3599: 3596: 3595: 3594: 3591: 3590: 3586: 3583: 3581: 3578: 3576: 3573: 3571: 3568: 3566: 3563: 3561: 3558: 3556: 3553: 3551: 3548: 3546: 3543: 3541: 3538: 3537: 3530: 3529: 3519: 3516: 3515: 3514: 3513:Wave function 3511: 3509: 3506: 3504: 3501: 3499: 3496: 3494: 3493:Superposition 3491: 3489: 3486: 3484: 3481: 3479: 3476: 3474: 3471: 3469: 3466: 3464: 3461: 3459: 3456: 3454: 3451: 3450: 3443: 3442: 3434: 3431: 3429: 3426: 3425: 3421: 3418: 3416: 3413: 3411: 3408: 3407: 3401: 3400: 3395: 3392: 3390: 3387: 3385: 3382: 3381: 3380: 3379: 3375: 3342: 3336: 3319: 3316: 3312: 3304: 3297: 3296: 3293: 3290: 3289: 3285: 3284: 3280: 3276: 3259: 3254: 3247: 3242: 3235: 3230: 3227: 3226: 3225: 3223: 3219: 3214: 3212: 3208: 3203: 3201: 3197: 3193: 3192:beam splitter 3188: 3179: 3175: 3171: 3168: 3163: 3160: 3156: 3150: 3141: 3137: 3135: 3130: 3125: 3118: 3105: 3086: 3082: 3078: 3062: 3058: 3051: 3048: 3030: 3026: 3009: 3005: 2999: 2996: 2980: 2976: 2972: 2956: 2952: 2948: 2934: 2926: 2923: 2910: 2891: 2887: 2883: 2867: 2863: 2856: 2853: 2837: 2833: 2816: 2812: 2808: 2805: 2789: 2784: 2780: 2776: 2760: 2755: 2751: 2747: 2744: 2741: 2734: 2731: 2718: 2714: 2707: 2704: 2693: 2690: 2687: 2673: 2665: 2662: 2656: 2643: 2635: 2632: 2629: 2613: 2609: 2602: 2598: 2581: 2577: 2573: 2565: 2562: 2559: 2543: 2539: 2532: 2528: 2511: 2507: 2503: 2497: 2494: 2483: 2475: 2472: 2470: 2453: 2435: 2432: 2429: 2413: 2409: 2402: 2398: 2381: 2377: 2373: 2367: 2364: 2351: 2347: 2322: 2319: 2316: 2300: 2296: 2289: 2285: 2268: 2264: 2260: 2254: 2251: 2238: 2234: 2225: 2222: 2216: 2208: 2204: 2203: 2198: 2197: 2191: 2186: 2174: 2171: 2167: 2164: 2160: 2156: 2154: 2152: 2148: 2144: 2140: 2139:gravity waves 2136: 2127: 2125: 2121: 2116: 2114: 2109: 2096: 2089: 2085: 2082: 2076: 2072: 2062: 2049: 2046: 2039: 2035: 2031: 2027: 2023: 2018: 2015: 2012: 2007: 2004: 2001: 1997: 1989:To show that 1987: 1974: 1969: 1965: 1962: 1956: 1951: 1948: 1945: 1941: 1937: 1932: 1928: 1907: 1904: 1901: 1898: 1895: 1875: 1872: 1869: 1849: 1825: 1821: 1817: 1813: 1809: 1801: 1796: 1794: 1790: 1789:3-phase power 1785: 1777: 1774: 1771: 1762: 1753: 1750: 1744: 1739: 1730: 1714: 1711: 1708: 1704: 1699: 1694: 1690: 1681: 1677: 1664: 1661: 1656: 1653: 1648: 1645: 1640: 1637: 1632: 1629: 1624: 1620: 1617: 1614: 1611: 1600: 1597: 1584: 1581: 1578: 1575: 1572: 1569: 1566: 1563: 1560: 1557: 1554: 1549: 1545: 1542: 1539: 1536: 1525: 1522: 1509: 1504: 1500: 1497: 1494: 1491: 1488: 1485: 1479: 1474: 1470: 1467: 1464: 1458: 1455: 1444: 1442: 1438: 1434: 1429: 1420: 1412: 1389: 1386: 1381: 1377: 1373: 1368: 1364: 1342: 1339: 1333: 1329: 1325: 1319: 1316: 1296: 1293: 1290: 1287: 1283: 1280: 1277: 1273: 1270: 1266: 1263: 1260: 1256: 1253: 1250: 1247: 1244: 1241: 1238: 1235: 1223: 1220: 1203: 1200: 1197: 1194: 1191: 1185: 1182: 1179: 1176: 1173: 1168: 1164: 1160: 1155: 1151: 1130: 1127: 1123: 1116: 1112: 1108: 1102: 1099: 1095: 1074: 1071: 1068: 1065: 1062: 1059: 1056: 1053: 1050: 1047: 1044: 1041: 1038: 1035: 1032: 1029: 1026: 1023: 1020: 1017: 1014: 1002: 999: 998: 997: 983: 979: 975: 955: 951: 945: 942: 937: 934: 931: 928: 925: 922: 918: 914: 911: 907: 902: 899: 894: 890: 887: 884: 881: 878: 873: 869: 865: 860: 856: 835: 831: 826: 822: 819: 816: 810: 806: 803: 799: 794: 790: 787: 784: 778: 774: 771: 768: 765: 762: 759: 756: 753: 750: 747: 744: 736: 720: 711: 708: 705: 702: 699: 696: 693: 687: 684: 681: 675: 672: 669: 666: 663: 657: 654: 648: 645: 640: 636: 632: 627: 623: 614: 610: 594: 571: 568: 565: 562: 559: 556: 553: 547: 544: 541: 538: 532: 529: 526: 518: 514: 505: 489: 486: 483: 480: 477: 469: 453: 449: 445: 442: 439: 436: 416: 393: 390: 387: 384: 381: 375: 372: 369: 366: 360: 357: 354: 346: 342: 333: 323: 321: 316: 314: 310: 306: 305:laser speckle 302: 296: 292: 286: 278: 277:even multiple 274: 264: 260: 257: 253: 249: 245: 219: 211: 202: 200: 196: 192: 188: 184: 174: 172: 168: 167:gravity waves 164: 160: 156: 152: 148: 147: 142: 141: 136: 135: 130: 127: 123: 119: 111: 107: 103: 99: 94: 84: 81: 73: 70:February 2022 63: 59: 53: 50:This article 48: 39: 38: 33: 29: 28:MoirĂ© pattern 22: 6931:Interference 6629:Quantum mind 6541:Franck–Hertz 6403:Klein–Gordon 6352:Formulations 6345:Formulations 6274:Interference 6273: 6264:Entanglement 6242:Ground state 6237:Energy level 6210:Fundamentals 6174:Introduction 6080: 6075: 6051: 6041: 6022: 6016: 5973: 5969: 5959: 5935: 5914: 5867: 5863: 5853: 5828: 5824: 5818: 5799: 5793: 5780: 5752: 5745: 5727: 5720: 5710: 5703: 5601: 5574: 5541: 5495: 5471: 5456: 5444:Thomas Young 5442: 5439: 5398: 5385: 5374:interference 5369: 5363: 5349:Applications 5255:matter waves 5248: 4985: 4748: 4198:wavefunction 4157:– resembles 4150: 4149: 3695:Klein–Gordon 3631:Formulations 3468:Energy level 3463:Entanglement 3446:Fundamentals 3433:Interference 3432: 3384:Introduction 3251:An oil spill 3215: 3204: 3189: 3185: 3176: 3172: 3164: 3151: 3147: 3138: 3129:polarization 3126: 3119: 2927: 2924: 2666: 2664:is given by 2660: 2657: 2476: 2473: 2454: 2226: 2220: 2212: 2206: 2201: 2200: 2195: 2194: 2190:optical flat 2147:matter waves 2133: 2117: 2110: 2063: 1988: 1797: 1786: 1783: 1775: 1770:point source 1767: 1751: 1734: 1731: 1682: 1678: 1601: 1598: 1526: 1523: 1445: 1443:is given by 1440: 1436: 1432: 1425: 1221: 1000: 329: 320:matter waves 317: 297: 293: 285:odd multiple 284: 276: 270: 241: 199:Thomas Young 194: 190: 183:interference 182: 180: 171:matter waves 145: 144: 139: 138: 132: 122:interference 121: 115: 109: 106:Out of phase 101: 76: 67: 51: 6887:EPR paradox 6667:Quantum bus 6536:Double-slit 6514:Experiments 6480:Many-worlds 6418:Schrödinger 6382:Phase space 6372:Schrödinger 6362:Interaction 6319:Uncertainty 6289:Nonlocality 6284:Measurement 6279:Decoherence 6269:Hamiltonian 5628:Diffraction 5498:slip gauges 5491:calibration 5382:frequencies 5343:matter wave 4206:probability 4084:von Neumann 4069:Schrödinger 3845:EPR paradox 3776:Many-worlds 3710:Schrödinger 3665:Schrödinger 3660:Phase-space 3650:Interaction 3555:Double-slit 3533:Experiments 3508:Uncertainty 3478:Nonlocality 3473:Measurement 3458:Decoherence 3428:Hamiltonian 3279:Matter wave 3218:iridescence 2209:, are seen. 1862:waves from 1428:plane waves 6925:Categories 6815:Extensions 6649:Technology 6495:Relational 6446:Copenhagen 6357:Heisenberg 6304:Tunnelling 6167:Background 5944:Leighton R 5695:References 5589:absorption 5532:telescopes 5394:difference 4079:Sommerfeld 3994:Heisenberg 3989:Gutzwiller 3929:de Broglie 3877:Scientists 3791:Relational 3742:Copenhagen 3645:Heisenberg 3503:Tunnelling 3404:Background 3273:See also: 3167:laser beam 2135:Mechanical 1743:wavelength 733:Using the 468:wavenumber 332:sinusoidal 267:thickness. 252:vector sum 205:Mechanisms 6521:Bell test 6391:Equations 6217:Born rule 6000:1367-2630 5983:1210.6243 5940:Feynman R 5911:Born, Max 5825:Phys. Rev 5593:impedance 5553:waveguide 5478:Michelson 5386:perceived 5366:acoustics 5308:Ψ 5266:Ψ 5181:Ψ 5136:Ψ 5089:∗ 5080:Ψ 5055:Ψ 5027:Ψ 5006:∗ 4997:Ψ 4891:Ψ 4863:Ψ 4841:Ψ 4800:Ψ 4758:Ψ 4749:Usually, 4715:∗ 4706:Ψ 4681:Ψ 4653:Ψ 4632:∗ 4623:Ψ 4580:Ψ 4535:Ψ 4496:Ψ 4435:Ψ 4407:Ψ 4385:Ψ 4342:Ψ 4322:∗ 4318:Ψ 4284:Ψ 4169:Ψ 4109:Zeilinger 3954:Ehrenfest 3683:Equations 3360:⟩ 3357:Ψ 3346:^ 3334:⟩ 3331:Ψ 3308:ℏ 3083:φ 3079:− 3059:φ 3052:⁡ 2888:φ 2884:− 2864:φ 2857:⁡ 2748:∝ 2719:∗ 2691:∫ 2633:ω 2630:− 2610:φ 2563:ω 2560:− 2540:φ 2433:ω 2430:− 2410:φ 2320:ω 2317:− 2297:φ 2215:intensity 2086:π 2036:φ 2016:− 1998:∑ 1966:π 1949:− 1942:φ 1938:− 1929:φ 1905:− 1822:φ 1715:θ 1712:⁡ 1705:λ 1665:… 1649:± 1633:± 1625:λ 1621:θ 1618:⁡ 1582:… 1573:± 1564:± 1550:λ 1546:θ 1543:⁡ 1505:λ 1501:θ 1498:⁡ 1489:π 1475:λ 1468:π 1456:φ 1453:Δ 1326:φ 1320:⁡ 1297:… 1291:π 1281:π 1271:π 1264:π 1261:− 1254:π 1248:− 1242:… 1236:φ 1201:ω 1198:− 1186:⁡ 1109:φ 1103:⁡ 1075:… 1069:π 1060:π 1045:π 1039:− 1033:π 1027:− 1021:… 1015:φ 976:φ 943:φ 932:ω 929:− 915:⁡ 900:φ 891:⁡ 807:⁡ 788:− 775:⁡ 760:⁡ 748:⁡ 712:φ 703:ω 700:− 688:⁡ 673:ω 670:− 658:⁡ 613:superpose 595:φ 572:φ 563:ω 560:− 548:⁡ 487:π 478:ω 454:λ 446:π 391:ω 388:− 376:⁡ 248:amplitude 201:in 1801. 181:The word 177:Etymology 6910:Category 6704:Timeline 6456:Ensemble 6436:Bayesian 6329:Collapse 6201:Glossary 6184:Timeline 6120:Archived 6049:(1999). 5948:Sands M. 5894:25401860 5606:See also 5585:velocity 4034:Millikan 3959:Einstein 3944:Davisson 3899:Blackett 3884:Aharonov 3752:Ensemble 3732:Bayesian 3637:Overview 3518:Collapse 3498:Symmetry 3389:Glossary 3198:and the 2170:coherent 1920:, where 1791:and the 159:acoustic 126:coherent 98:In phase 6863:Related 6842:History 6581:Science 6413:Rydberg 6179:History 5872:Bibcode 5833:Bibcode 5597:crystal 5482:cadmium 5409:tremolo 4074:Simmons 4064:Rydberg 4029:Moseley 4009:Kramers 3999:Hilbert 3984:Glauber 3979:Feynman 3964:Everett 3934:Compton 3705:Rydberg 3394:History 3155:sodium- 2163:complex 2143:optical 1800:phasors 609:radians 502:is the 466:is the 118:physics 56:Please 6556:Popper 6063:  6057:97–109 6029:  6008:832961 6006:  5998:  5946:, and 5923:  5892:  5806:  5768:  5688:Upfade 5405:unison 5401:tuning 5390:volume 5378:sounds 5372:is an 4161:. 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Index

Interference (communication)
Moiré pattern
Interference pattern (electromyography)
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When two or more waves travel through a medium and superpose then the resultant intensity do not distributed uniformly in the space. At some places, it is maximum while at some other places it is minimum. This non uniform distribution of intensity or energy of light is known as interference.
In phase
Out of phase
physics
coherent
waves
phase difference
light
radio
acoustic
surface water waves
gravity waves
matter waves
Latin
Thomas Young


principle of superposition of waves
amplitude
vector sum
crest

phase
double-slit experiment

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