Questions tagged [double-slit-experiment]

The double slit experiment involves passing light through two parallel slits to demonstrate that the light from one slit interferes with that from the other.

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Disappearing electron

I'm sure the answer to this question will be 'no', but I'd really like to understand why/why not. Say a single electron is sent towards a double slit. Some people talk of it 'going through both ...
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Do gravitational waves affect double-slit experiment?

Earth surface gravity doesn't constitute as observation so the probability wavefunction of photon used in the double-slit experiment doesn't collapse so what about gravitational wave that LIGO can ...
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Double silt experiment with one circular polarizer in front of only one slit in the which-way perspective?

If one puts in front of a double slit two quarter-wave circular polarizers (QWP) in front of each slit, say one with 45° and the other with -45° orientation (fast and slow axis - i.e. clock- and anti-...
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Amplitude modification in double slit interference

Over the surface of interference, illumination varies. We have calculated so perfectly about it so that we know exactly how the variation chart looks like. Even our vision renders it as in that chart. ...
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Coherent states and QM, Double slit and measurements

In the thread Localization of Electron Matter Field Excitation in Simple Electron QFT Model a vital question about QFT is asked namely ´what keeps the electron matter field excitation localized ...
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Diffraction pattern vs Interference pattern

I am not confused with difference between Young's double slit experiment and diffraction. In Young's double slit experiment, the interference pattern is bright fringes separated evenly with ...
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Why do the distances between the fringes depend on the wavelength? [closed]

In the double-slit experiement, with the monochromatic light, the longer the wavelength, the more the distances between the fringes. Can somebody explain why?
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Confusion regarding path difference by glass slab in YDSE

If in a YDSE experiment the setup is immersed in a medium $n_{med}$, and a glass slab of thickness t of another medium $n_{glass}$ is introduced in front of one slit, then is the path difference due ...
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Multiple Double slit experiment

In school, I am learning about the Double Slit experiment and it's implications on Quantum Mechanics. I was wondering if the double slit experiment was possible with many different slits and screens. ...
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Number of fringes that will shift when one slit is covered by a transparent sheet in YDSE

The following text is from Concepts of Physics by Dr. H.C.Verma, from the chapter on "Light Waves", for the number of fringes that will shift in a Young's double slit experiment (YDSE) when one of ...
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Is the ‘diffracting angle’ talking about the first minimum or first maximum?

So when we talk about diffraction for single slits, we refer to the first minimum as the ‘diffracting angle’. However, in other experiments with wave particle duality (for example electron ...
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Single slit experiment

Suppose we are doing a double slit electron diffraction experiment and we place a detector behind the slits to detect which slit the electron passes through. If we do this the diffraction pattern will ...
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How did scientist get photos of wave function of electron in the double slit experiment?

In the double slit experiment I know that the electron fires as a particle one at a time then splits goes through both slits and recombined and interferes with itself and hit the wall creating a ...
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Does this thought experiment violate de Broglie hypothesis?

A friend of mine, Nima Fathali, asked me a question for which I could not find a clear answer. De Broglie's hypothesis asserts that when the (de Broglie) wavelength is small in comparison to the size ...
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Interference pattern vertical or horizontal

in a double slit experiment, if the 2 slits are horizonal, the interference pattern will be of horizontal lines. But what about if the 2 slits are point sources. Will the interence pattern be ...
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Why does interference pattern remain constant?

In the double slit experiment we have something like this Light waves from two sources interfere at screen to give us this pattern. To reach the middle (that is a point on the perpendicular ...
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Phase Delayed Double Slit Experiment

Lets say we have a double slit setup where a plane wave hits 2 narrow slits and travels down a small channel. One of the channels has a dielectric which will slow down the light passing through it. ...
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Strange interference pattern of light on top of tower, pattern was seen on air. What was it?

I was just looking out of window at night when I saw a tower with a light on top. It had a red light. When I looked at it through my curtains with net on, I saw an interference fringe, one is the ...
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What can triple slits experiment tell us that double slits experiment could not?

I read that some people used triple slits experiment to create 3D qubits, I like to know what can the triple slits experiment tell us about the duality and nature of quantum object that isn't obvious ...
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What happens to the Fringe Width when the velocity of electrons passing through the slit in Young's Double Slit Experiment increases? [closed]

A beam of electron is used in Young's Double Slit Experiment. The slit width is d. Then the velocity of electron is increased. What happens to the Fringe Width? My approach: $$\beta = \frac{\lambda ...
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What is the difference between Young's double hole experiment and Young's double slit experiment?

I wanted to know why we usually prefer double slit experiment rather than the original double hole experiment, is there any difference between the observations of the two experiments?
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Double slit detector properties

As the only way for me to follow discussions about double slit phenomena is through this site and some videos, I must be clear that I don't know how an actual double slit detector looks like and how ...
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Comparison between X-ray diffraction and slit experiment

Most diagrams regarding X-ray diffraction suggest that after hitting an atom, X-ray would get reflected. But then the method results in an interference pattern which means X-ray get diffracted. I am ...
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What happens in the double slit experiment if the detector is close to the slits?

In the double slit experiment (with photons say) (see diagram below), what happens if the detector screen is moved close enough to the slits that the two light "cones" don't touch? Do the photons now ...
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How do you detect a photon double slit experiment

How does one detect which slit a photon has passed through in a double slit experiment? Would the double slit experiment change if the photons were to pass through vacuum tubes instead of slits?
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Young's double slit experiment with a single photon

i am a year 12 student and as i was reading a book written by Brain Clegg, i hit a roadblock. It would be great if somone could help me out with this. when we conduct young's double slit experiment ...
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Will the mirror reflection make the interference pattern disappear?

I have read this question: When light reflects off a mirror, does the wave function collapse? where dmckee says: Now, even giving a precise statement of what makes a "measurement" is non trivial, ...
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Actual data of single photon double slit experiment

I am interested in mapping the actual location of single photon impacts in a double slit experiment as a time series. In other words, I would like three data points for each photon measurement - the ...
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In Young's doublte slit experiment what happens if instead of cylindrical , spherical wavefront are taken?

Specifically in case of wavefront developed similar to wavefront developed by a convex or a concave lens .(essentially getting converging or diveging beam of light ) Do we see straight strips of dark ...
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Do we know which slit the photon went through in Afshar's experiment?

I've been reading up on this experiment and it seems to be that even measuring the photon to only go through one of the slits, it still creates the interference pattern. Do we really know which slit ...
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What do quantum eraser actually do?

From what I know it basically erases which path information so even though the detectors still interact with the photon, but not able to tell which path the photon takes the result is a interference ...
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Young's double slits with a hole in the screen (Wheeler observer)

In Young's double slits experiment, there are points on the screen where the probability of an impact is null. I drill a hole at such a point and place a second screen E2 behind E1. I guess that there ...
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Modifying “Delayed Choice Quantum Eraser” experiment to send messages in past

Firstly, I am a science fiction writer --- please do not judge my technical knowledge harshly. (Also, English is not my first language.) I'd like to know whether it is nonsense or not to have the ...
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Single Slit Thought Experiment

If it were possible to fire a single Electron through a slit of exactly the same size, would there be zero interference at the detector?
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Rayleigh Criterion in Young's Double Slit Experiment

Consider Young's double-slit experiment with slit width a and slit separation d, is it possible that it does not fulfill the Rayleigh Criterion i.e. the distance of the 1st order minimum from its ...
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If a photon truly goes through both slits (at the same time), then why can't we detect it at both slits (at the same time)?

I am not asking about whether the photon goes through both slits, or why. I am not asking whether the photon is delocalized as it travels in space, or why. I have read this question: Do we really ...
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Double slit experiment on buckyballs

Whenever we have a "macro" object like a buckyball, it has many electrons and quarks if not something more fundamental, all of which have their own wavefunctions that interact with each other. But in ...
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In double slit experiment, It's the wave function who represent particles, travelling?

I saw some videos that tend to show traveling waves to represent the photon/electron in a double slit experiment. Is it right? Because the space between the electron gun and the screen where these ...
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Young's double slit experiment modified

When an electron passes the double slit it hits the screen leaving a trace but we don't know anything about which one of the two it acctually passed.What about making a single slit on the screen where ...
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Why do photons deposit their entire energy at a single point?

A version of the double slit experiment is done by firing single photons. It is possible that the fired photon could pass through either slit because of its small size. It is also possible that the ...
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Size of a single dot on a screen in a double-slit experiment

When a single photon hits a screen - it leaves a dot; and many dots of other photons later - an interference pattern emerges. My question is about size of a single dot. What are key factors varying ...
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Modified Double Slits: 2 Sources

Setup: 2 identical electron guns capable of firing 1 electron each time, 2 slits, 2 detectors which will lit up when something passes through one of the slit. Both guns to fire at the same time ...
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Modified double slit, slanting

Would it matter if the slits are positioned at different distance away from the source? Case 1: Shuts Slit A(nearest slit) after assuming particle should reach it by then. Case 2: Shuts Slit B after ...
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In double-slit experiments, path detection makes interference fringes disappear. How comes the detection screen does not?

One observes that the fact of detecting the location of a particle path (which slit the particle went through) entails a collapse of the particle field (interference fringes disappear on the detection ...
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Double slit experiment with electron one at a time

I understand how a wave create the interference pattern, but what is the mechanism for a single electron after it pass the slit and scatter and land at different location on the screen to produce the ...
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Should light travelling post-double slit between an elongated single slit formed from two razor blades still interfere?

I am continuing to experiment with Young's double slit experiment at home. As before I have used a small pen laser and shone the light through double slits formed from very fine wire and black masking ...
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Travelling slit in double slit experiment

In the double slit experiment, the interference pattern depends on the wavelength of the light. But if I run at the light source really fast shouldn't the light blue shift and hence cause a different ...
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What do you mean by particle can be in two places at once?

Does it means that the particle (assume it has a single wave function) can show up on any 2 of infinite number of detectors at the same time? Or as hint by the single shot double slit experiment that ...
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Practically, how does an 'observer' collapse a wave function?

I have been reading/learning about the double slit experiment, its implications in quantum theory, and how it explained that “particles” can behave as both waves and particles. I know that the wave ...
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Interference of light waves

So my problem now is how do I add the intensities of the resultants of the two constructive interferences. Thanks in advance. Don't hesitate in asking me anything related to the question.