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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Simulation for double slit experiment

I did with pygames a simulation for the double slit experiment. Assuming the photons are particles which do not interefere. My idea was to assume that the photons are distributed randomly and ...
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Why aren't we taking advantage of the waves during the double slit experiment? [on hold]

If we were to place a tiny two sided mirror at a point between the double slit and the screen ..where we know there is a good probability of the two waves interfering. Would the bounced photons be ...
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Would the results of the Double Slit Quantum Eraser be the same using massive particles?

I'm wondering if the double slit quantum eraser experiment would produce (or does produce, if it's already been done) the same results if massive particles were used instead of photons. My reason ...
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Quantum Key Distribution via Modified Double Slit Experiment

Here's my reasoning: Setup 1: Take a traditional double slit experiment and turn on the photon source. Interference fringes should appear on a detector screen placed opposite the photon emitter, ...
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Envelop Experiment question

The following is an extended version of the Delayed Choice Quantum Eraser called "The Envelope Experiment." This may be referred to as the "sealed envelop" or "very delayed quantum eraser." See ...
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Can there be interference between a proton and an electron?

For example, we know that we can interfere two different electrons or two different protons by employing them in a double-slit experiment. Now suppose, we mix protons and electrons and shoot them ...
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Colored fringes in Young's Double Slit Experiment (YDSE) using white light

Suppose we use a monochromatic light in YDSE. We observe the regular type of fringes of mainly the same color and they fade away as the distance from central maxima increases. But with white light we ...
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Delayed Choice Quantum Eraser with one additional detector at the slits?

Please take a look at this experiment https://en.wikipedia.org/wiki/Delayed-choice_quantum_eraser#The_experiment_of_Kim_et_al._(1999) . You can also look at this youtube video https://www.youtube.com/...
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Proof for shapes of fringes on complete screen

I recently studied about fringe patterns due to interference and we learnt to calculate position of Central Maxima etc. At the end of a reference book I saw that the shape of fringes on a complete ...
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Projecting double slit onto fog instead of screen [duplicate]

In the quantum mechanical double slit experiment, the resulting pattern is projected onto a screen. This is an important part of the experiment, because the screen represents the quantum mechanical ...
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Does this thought experiment proves that Standard Quantum Mechanics and Pilot Wave Theory make different predictions?

Here is a thought experiment that is supposed to show that standard quantum mechanics and pilot wave theory do not make the same prediction : Take the double slit experiment, and add a detector in ...
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Are superposition quantum systems really in two pure states at once?

I know that quantum systems can have properties of waves as well as those of particles. Also, I know that the mathematical description of quantum states is probabilistic, i.e. $$\Psi = \frac{1}{\sqrt{...
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Double sit experiment and Uncertainty

If we try to an electron with a high energy photon, we precisely detect its position, while its momentum becomes totally uncertain. On the other hand, if we detect it using a low energy photon, its ...
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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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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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Would a million slits experiment works?

I read that in triple or more slits experiment, the particle can sometimes though lower probability of going through all the slits and interfere with itself many times at once? I used to think it is ...
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Single photon interference, state “top” current theory [duplicate]

Is there a simple generally accepted explanation for single photon interference? Does each photon interact with or see both slits?
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Why Delayed choice quantum eraser doesn't produce two lines

As I understand, a Double slit experiment produces interference pattern or two broad distributions on the detector based on observation. Does delayed choice quantum eraser produces the same patterns ?...
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How can a bright fringe be not as bright as a dark fringe in YDSE? [closed]

The book says that the last bright fringe in the interference pattern within the central maxima in the diffraction envelope can not be seen as it cannot be as bright as the diffraction dark fringe. ...
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Can you help me clear up the double slit experiment?

So I know what happens in a double slit experiment and that if you put an observer, it changes the outcome of the experiment. It has to do with Heisenberg's uncertainty, but how does his uncertainty ...
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Double-slit diffraction: is $x$ measured from the centre to the fringe, or between the fringes on either side?

In using the formula $\lambda = \frac{ax}{D}$, is $x$ (the fringe separation) measured from the centre to the fringe, or between the fringes on either side of the centre? In other words, in the ...
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Timing in double slits experiment

In this setup the source, the slits and the screen are a lightsecond away from each other. I would like to know if there is any difference if I tempered with the slits before and after the photon is ...
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Quantum eraser without the quantum eraser

I've recently watched PBS SpaceTime's video about the quantum eraser. In it, Matt describes a kind of crystal that splits particles into pairs and entangles them. The entangled particles are then ...
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Question on the double slit experiment

Out of curiosity I wanted to ask what people think about this idea. I understand that when we do the double slit experiment and observe the particle, we get a wave collapse because of the observed ...
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Confusion regarding path difference by glass lab 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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Trying to understand quantum physics double slit experiment [closed]

I have watched many videos and read many articles and it says that a particle is acting like a wave. So why we try to understand on which hole the particle went through? Clearly a wave will pass ...
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How can a double slit interference pattern be created without out going through a double slit

When I create a double slit in a mirror by removing the paint and silver I get a beautiful interference pattern. What’s interesting to me is that I get one in the opposite direction too. What has me ...
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Does wave-particle duality rely on accepting the Copenhagen interpretation?

If you're a scientist that subscribes to the many worlds theorem, does that mean you do not accept wave particle duality? Seeing as MW postulates that the wave or particle form has always existed that ...
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Young slits, mirrors and interference patterns [duplicate]

Why do Young slits projecting via an intermediary mirror to a screen still shows the normal pattern of interference? This happens even though the mirror is so close that not all interference is ...
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Young's double slit experiment - fringe width [closed]

What is the main difference between fringe width and fringe breadth?
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Double slit experiment with separate light sources?

Hi I'm stuck on a conceptual question I am working on which has frustrated me as I'm not sure I still understand this topic but essentially the question is asking: You complete a Youngs double slit ...
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How to visualize double-slit interference w/ object creating path difference?

A thin flake of mica (n = 1.58) is used to cover one slit of a double-slit interference arrangement. The central point on the viewing screen is now occupied by what had been the seventh bright ...
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Physics Young's Double Slit Problem

In a Young's Double Slit experiment, the separation of four bright fringes is $2.5\ mm$, the wavelength of light used is $6.2 \cdot 10^{-7}\ m$. If the distance from the slits to the screen is $80\ cm$...
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Interference of two lasers in a double slit [closed]

I was wondering if there is any interference between two lasers shot at the same time through a double slit.
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Why is a point source required for observing perfect double slit interference?

What would happen with a non-point but coherent source (some kind of ideal flashlight which produces perfectly coherent light for example)?
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Why are photons particles and waves, instead of particles that simply move in a wave pattern?

I understand the double slit experiment, but even with the results, why are photons determined to be particles and waves at the same time, instead of particles that move in a wave pattern? In bodies ...
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Does the thickness of a slit play a role in the fringe pattern of either the double or single slit experiment?

So it is widely known that the width of the slit affects the interference pattern. And the double slit experiment is a demonstration of the wave nature of light. But i could casually see how the ...
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Why do the two slits of a double slit experiment not make light coherent and create an interference pattern if monochromatic light is passed through? [duplicate]

If a narrow slit makes monochromatic light coherent, why is light required to pass through the single slit before the double slits in Young's experiment? Wouldn't the double slits individually make ...
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Double slit diffraction

In the intensity pattern of double slit there are two terms one for single slit diffraction $\sin^2a/a^2$ and another is double slit interference $\cos^2b$.In the intensity pattern of double slit ...
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If you pass light through a double slit and back through the same slit again is there an interference pattern or particle pattern?

If you pass light through a double slit and back through the same slit again (say by using mirrors to bounce it back around) is there an interference pattern or particle pattern? I'm curious what ...
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Once Which-Way information is known, and the photon passes through another double slit, can it become a wave again?

So was thinking if we construct 2 levels of double slit experiments where in the first we know whichway information, and then the same photons pass through a second double slit experiment, will they ...
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Question on Double slit diffraction

In the two-slit interference experiment, how can we determine where a point P on the screen is in the diffraction pattern by giving the maximum or minimum on which it lies or the maximum and minimum ...
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What are Bohmian trajectories for a free electron?

A free electron, or any other quantum particle, has an uncertain position/momentum, according to Heisenberg uncertainty principle. The squared amplitude of the wavefunction determines the probability ...
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Are photons avoiding destructive angles of diffraction in a single photon at a time experiment?

Are photons avoiding the angles of diffraction where destructive interference would occur if they weren't alone in a one photon at a time double slit experiment? Is the number of photons detected on ...
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re loss/gain of energy by particle/wave photon/electron to slit grating

Although an electron or photon wave is meant to just diffuse and interfere, when it hits the screen in a certain diffraction pattern at the end, the particle version would be considered to have ...
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Are photons blinking? [closed]

Is a photon passing through a point in space blinking relative to that point? If the photon for some reason destructively interfere with it self at that point, what happen to it? is it off or ...
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In a pilot-wave model, is knowing the position of the particle sufficient for predicting its behavior?

Suppose that we somehow exactly know the position of an electron before hitting the double-slit structure (for example we know it's 20cm away from the structure and it's closer to the left slit). In ...
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What is the Detector in the double slit experiment and how it works?

What about the "DETECTOR". Is it a passive device or is it just a fictional mathematical prob. I think that detector is somehow consuming the energy responsible for the wave nature of the photons, ...
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What is “quantized momentum transfer”, and can it account for the double-slit experiment?

In https://www.sciencedirect.com/science/article/pii/S0378437109010401, the author claims that the interference pattern obtained in the double-slit experiment does not need a wave description of ...
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Double Slit Experiment : Photon vs Electron

are the following statements correct: For Young's double slit experiment with electrons, the separation between two slits has to be smaller than the position uncertainty of the electrons. But no ...