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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Experiments with particle and light that I don't understand [closed]

I have these following two experiments that seemed not so clear for me Michelson Morley experiment - The first one is the experiment from Michelson and Morley who proved (if I'm not wrong) that the ...
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Feynman’s electron double slit experiment?

I have seen several questions on the site about this, but most of them get bogged down into new complex interpretations of quantum mechanics. For reference, I am a high school student just starting to ...
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Wave and particle nature of light during detection in a single-photons double slit experiment

I am just a curious physics student. This question is about the nature of light. In a single-photons double slits (or multiple slits) experiment, the interference pattern or the distribution of the ...
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Why is my approach wrong in the double slit experiment? [closed]

I tried solving the double slit experiment formula this way, and I can't seem to find just what I have missed.
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Multi-Dimension Double Slit Experiment

I'm not an expert in physics but it struck me recently that when performing the double-slit experiment, the measurement to detect the electron's location is performed at only one location, that is to ...
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Young slit conundrum - Finding positions of maxima when one of the slits emanates light with phase difference

Second guessing myself a bit here, but I've run into a bit of an issue. The problem I'm trying to solve is this: Coherent light of $532nm$ is passing through a double slit, which are separated by $25\...
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Finding the distance from source in triple slit interference

I was wondering about the nature of the 3 slit interference pattern, as shown in fig 1. The line labelled LT/2, matches with fig 2 and all other diagrams I have seen depicting the same thing. I was ...
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Thought Experiments

Can anyone please explain to me the importance of thought experiments? How does one arrive at a conclusion in a thought experiment. Like for example, the electron through double slit experiment is a ...
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Many-world interpretation of double slit experiment

Different interpretations of young's double slit experiment is available, I read Copenhagen and Feynman's path integral interpretation of double slit experiment; former uses the idea of wave function ...
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Does quantum field theory and field excitations explain the double slit experiment?

I'm a student and I'd like to confirm my understanding of Quantum field theory (QFT). QFT says particles are actually excited states in pre-existing fields. Each field is only excited with specific ...
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X-Ray Diffraction: Calculate the phase difference at the detector between waves scattered by 2 different points in a sample

I have very little idea what I'm doing here, but my goal is to calculate the difference in phase of the waves scattered by 2 points in some sample. The figure below shows my interpretation of the ...
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Lateral Shifting of a ray in YDSE experiment when a slab is inserted in after a slit

I was studying YDSE. It was a topic where a glass slab was inserted just after a slit. Does lateral Shifting takes place? If it takes place then why does the ray go straight as shown in image below? ...
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Probability density in double slit experiment

I don't understand why the probability density in the double slit experiment in the case of both slits opened, has a minimum corresponding to the maximum of intensity. Shouldn't $P_{12}$ have the same ...
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How to move from the aperture to the far screen (from identity to Fourier transform in a smooth way)?

In diffraction experiments, the pattern on a screen is the fourier transform of the aperture when it is a Fraunhofer diffraction (when the screen is far from the aperture). When the distance is null (...
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Double-slit experiment and hidden variables

I wonder if double-slit experiment can be considered a proof of non-existence of local hidden variables in quantum mechanics? Consider this: probability $P(A \: \textrm{or} \: B)$ that either one of ...
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What result will we get in the alternative double-slit experiment?

My son offered me a description of the experiment First, the photon passes through double-slit. If the photon passes through the first slit it goes to BBO1. This crystal converts the photon into a ...
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Why do waves, specifically light, diffract through a slit?

I've been wondering this for a while now, and have thus far only come across answers that seem to use an equation as an explanation. I've also looked at Huygens' principle (albeit not in-depth), but ...
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Double slits experiment: how does the which-way entropy vary with the distance between slits and screen?

When the screen is just behind the slits we have perfect which way information. The entropy is log 2. It decreases if I place the screen in the Fresnel region (not to far). It decreases much more in ...
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How is the dual slit experiment performed?

The most classical quantum theory experiment is the dual slit experiment where photons or electrons can be sent through one or two slits to see the pattern they create on the other side. This ...
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Can pure destructive interference be used to separate light waves and collapsed light particles?

In the double slit experiment we see that light waves can interfere with themselves to create interference patterns made of constructive and destructive interference. However, when we observe light ...
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Why does small angle approximation work for Young's double slit and not for single/multiple slits?

I understand that for a double slit experiment the equation is $\lambda=xd/L$, which has come from the small angle approximation of $d\sin\theta = n\lambda$ by assuming that $\sin\theta = (x/L)$ and ...
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If a photon truly goes through both slits, then why can't it make two dots (excite two atoms) in the screen? [duplicate]

There are a lot of questions on this site about the double slit experiment, none of them answer my question specifically. I am not asking about detection or detectors or anything just at the slit. My ...
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Quantum measurement paradox

let's define 'a measurement device' as a system which is highly sensitive to the eigenstate of an observable. The sensitivity is quantified let's say by how irreversible and grand the small changes in ...
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Should also laser beams be tried as detectors in Double Slit Experiments?

If we know that a photon scatters an electron should it be tried as an indirect detector to say a deflector at one slit which can help to deduce the 'which path' information as only an electron that ...
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In the Double Slit Experiment, what type of wave are we talking about?

I was learning about the double slit experiment and simple explanation is that there is wave interference. Although I do not quite understand the wave bit. We know that light is a wave. But in the ...
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Is it possible for an interference pattern to appear while experimenting with entangled photons? [closed]

An specialist in quantum information asserted that "entangled photons will never show an interference pattern", but that seems to contradict the response to another question I made here. He ...
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Using laser scattering beams instead detectors in Double Slit Experiment?

In the Double Slit Experiment for electrons could be possible the use of an appropriate laser pointer at one slit aiming up so when an electron passes through that distinct slit it get scattered up so ...
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Double Slit Experiment question regarding an observation doesn't seem to collapse the wave function

During the double slit experiment, when we see interference on the screen that shows the light as a wave, why doesn't it become a particle as soon as it interact with the screen? Wouldn't this be the ...
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What happens in the double slit experiment if the screen is far away?

I've started reading a book on Quantum mechanics and started thinking what would happen if we did the double slit experiment with electrons but we moved the screen far far away. My newborn thought is ...
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Double slit experiment: Single photons of red light mixed with high intensity infrared light

First this is only a presumtion. Let say we fire single photons of red light at the double slit to get a interference pattern on the screen. The distances between frindges would have certain ...
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Wikipedia about double slit experiment and my question about that

Wheeler's delayed choice experiments demonstrate that extracting "which path" information after a particle passes through the slits can seem to retroactively alter its previous behavior at ...
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Double slit experiment with polarizers as detectors [closed]

What is the physical background for the statement that placing polarizers as detectors gives the 'which path information' so the interference pattern disapears? Is it that photons with polarization ...
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Restoring double slit interference by disconnecting the recording device

I think it was my graduate quantum mechanics textbook (Gottfried and Yan), I read a description of the double slit experiment. It first described how the act of measuring which slit the particle goes ...
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A wave or a particle?

Ever since I first read about the quantum eraser experiment, I was wondering: if after the "measurement" the wave function collapses and we can observe a particle - does that particle remain ...
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Understanding the Double Slit Experiment without Path Integrals

Despite being presented as one of the fundamental results of Quantum Mechanics in practically every textbook, I realized this morning that I don't understand deeply how Quantum Mechanics predicts the ...
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Double-slit experiment with electrons

In the double slit experiment (with electrons), physicists wanted to know which of the two slits the electron passed through. Of what use is knowing which slit the electron passed through?
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How does Bohmian mechanics explain the effect of information in the double-slit experiment?

De Broglie and David Bohm found a method (1952) that explains the double-slit experiment and its variations, which are so central to QM, in an intuitive way without appeal to probability, wave-...
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Double-slit-experiment and virtual particles

In the double-slit-experiment, one particle at a time (for example, the double-slit-experiment performed by Dr. Tonomura showing the build-up of an interference pattern of single electrons) can be ...
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Confusion regarding Young's double slit experiment in different media

The Problem Consider the given arrangement: Point $P$ is equidistant from $S_1$ and $S_2$ .The glass slab in air has refractive index $\mu_{2}$, and the one in water($\mu_{1}$) has refractive index $...
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Writing wave equation for a wave in two different media

Consider a young's double slit set-up in water. Consider a point $p$ on the screen , such that $S_{2}P-S_{1}{P}=s$. Then , Wave equation for wave from $S_{1}$ at point P: $Asin(2\pi/\lambda(x) -\omega ...
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What will a very big observer compared to humans observe if he uses humans on a double slit experiment?

Suppose there is a huge world in our universe and their laws of physics is the same as ours. Humans are like atoms compared to that world. In that world a double slit experiment is being performed by ...
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Does the observation instrument need to be conscious in order to change the interference pattern in the “Double slit experiment”? [closed]

I am an absolute amateur in physics but some questions haunt us all, don't they? In some places I hear/read that the conscious observer changes the pattern (https://youtu.be/XDpurdHKpb8?t=1559). In ...
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Trouble understanding the double slit probability measure

The probability of a particle going into either of two slits is given, classically, by $$ P=P(\text{slit}_1)+P(\text{slit}_2)=|\psi_1|^2+|\psi_2|^2=1 \tag{1} $$ This probability must be equal to $1$ ...
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Does the particle interfere with itself, or the observer?

In the double slit experiment, the observer doesn't know which slit the photon went through so the wavefunction is modelled as going through both slits at once and thus there's interference on the ...
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Double slit experiment with detector size of obs universe

If each isolated photon interferes with itself as a wave, and the unbound photons' wave equations for position extend the entire universe (with decreasing amplitude), would faint interference patterns ...
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Is quantum mechanics often explained wrong? [closed]

I may be flat-out wrong here, but it seems to me there is a very common misunderstanding of what the double slit experiment results mean, at least by non-physicists, because of the way it is often ...
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How does dependence between observables appear?

Consider a double slit interference experiment with particle A. After going through the slits the state is: $\left| \Psi \right\rangle = {\alpha _1}\left| {{a_1}} \right\rangle + {\alpha _2}\left| {...
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The Von Neumann interpretation of the Double Slit Experiment

First, I am a philosopher not a physicist, so apologies for limits in my understanding of quantum physics. My interest is in the philosophical implications of physics. I've just joined looking for ...
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Is there any real world “double slit experiment” where the which-path measurement made?

I am not a physicist, but a fan of physics. I found many videos on YouTube which explain the "double slit experiment" but most of them use animation and that is OK. When I search for any ...
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Mathematical Modelling of Single and Multiple Slit Experiments

Hello fellow StackExchange members! I have been taking a physics course for a while and was particularly fascinated by quantum mechanics. When learning about electromagnetic waves, the slit ...

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