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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How does the wavefunction of an electron “decollapse”?

In quantum theory, when an electron is sent through a slit (or multiple slits),the electron is described using probability amplitudes and is said to be in a superposition of multiple quantum states. ...
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What happens when the depth of the slit varies in the double slit experiment?

What meaningful effect is there if the depth of the slit varies in respect to the wavelength? Cases: D < λ D = λ D > λ
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Could brain “entanglement” explain the double slit experiment?

I know I should abandon trying to figure out quantum experiments and simply accept the various interpretations in the physics books but please bare with me and explain why my latest idea is wrong. I ...
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What is the Correlation between the shadow/s of the gap and the dark regions in a double-slit-experiment?

Are the destructive interference dark areas on the wall behind the slits also the shadow of barrier between the slits? Or the shadow is only a triangle which its base is the barrier and its tip ...
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$N-$ slit generalization for intensity patterns

I have been studying the intensity patterns of single slit, double slit and triple slits. Each intensity pattern depending on how you add the individual electric field components at a point on 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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What effect will moving one light source closer to the screen have on the diffraction pattern of two coherent light sources?

Say that you have two coherent light sources to begin with, each the same distance away from a screen, but then, you move one of the light sources closer to the screen by a fraction of the wavelength ...
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Typical distances in double slit experiments

I haven't been able to find the typical distances between walls in the double slit experiments. For instance, in this arxiv preprint, they only give the width and height of the slits (plus a mask they ...
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Do we add fields or probabilities/intensities in the double-slit experiment?

First, some background. It was found, empirically, that when we send a certain kind of stuff (“particles,” such as photons or electrons) through a very narrow slit in a plane, and we detect them on a ...
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What if you turn the photon detector on after the paired photon has already gone through both slits?

Id imagine the answer will be that even if you turn the photon detector on after the paired photon has already hit the screen, the screen will show no interference pattern because the universe sensed ...
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Wavefunction of an electron after a slit

To properly understand the double slit experiment with electrons, you need to know what is the wavefunction of the electron after it passes through a slit. This wavefunction cannot be a plane wave. ...
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Does really each and every single photon leave a dot on the screen in the bright area (double slit)?

This is not a duplicate. No other answer has said anything about this specific question. I have read this question: Why does the photon strike at one or another place on the tape? where PhysicsDave ...
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A little doubt in Young's Doble slit Experiment [closed]

As title says ( https://imgur.com/a/G3AzaXr ) I want to know how I have no idea about this $A\cos\theta=a+a\cos\phi$ $A\sin\theta=a\sin\phi$
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Has someone conducted following double slit experiment?

First create two separate observers or control groups, controller Group A and controller Group B. They should not be aware of each other actions and are isolated from each other. The only ...
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How to live-project a large, high-visibility double slit interference pattern?

I want to do a double-slit interference pattern for a lobby display. I've done double slits many times in classrooms and labs. They're small and not highly visible. I'd like to make the pattern ...
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Tilted screen in Young's double slit experiment

I was wondering what would happened if we titled the screen in Young's double slit experiment (YDSE) by a certain angle say $\theta$. What effect would it have on fringe patterns and their intensities ...
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In Young's double slit experiment, does the intensity of light depend on the slit width?

Here's a question I just came around In YDSE, the intensity of the maxima is I.If the width of each slit is doubled, what will be the intensity of maxima now ? here, we assume that no diffraction is ...
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Why won't my interference pattern go away?

Bought a double slit diaphragm, laser pointer and some linear polarizing sheets off of Amazon so I could see the double slit experiment first hand. When I place a vertically aligned polarizer in ...
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Error due to assumptions taken to derive the formulae for interference pattern in young's double slit experiment

The screen is far away. So we assume w/D << 1 where w is the distance between the slit and D the distance between screen and slit. But if this assumption bring about error which is comparable to ...
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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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Detecting particles that do not make it through double slits, do observations match those after the slits?

I suppose we have 4 conditions to examine : { single particle | beam } * { with eraser | without eraser } I suppose we have to get the same results that those ...
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Should particle-wave duality be understood as a description of light's dual nature or as a description of two observable states of light?

In double slit experiments, light is observed in two distinct conditions (no measurement of trajectory / measurement of trajectory) that bring two different results (no interferences / interferences). ...
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What is the admissible range of sizes or scales for double slit experiments?

Sometimes, the slits are in the range of nanometers, but I often bump into comments saying you can try this at home with lasers and polarized glass. Recently, I even found clearly macroscopic pictures ...
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Double-slit experiment with erasing all the collected data

The question concerns the double-slit experiment with collecting the data to register through which of the slits every single photon has passed. As I understand, in this case, when the photons are ...
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Question on some basic principles of quantum theory [closed]

I asked a physicist (former head of the physics department in a university) about some of the basics of quantum theory and the double slit experiment. Here is his reply. Are any of these points ...
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Change of Young double slit pattern after a reflection

I made a Young double slit experiment on sunlight that showed clearly the pattern of maximum and minima demonstrating the wave aspect of light.Anyway, if, beyond the double slit the light is ...
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electron double slit experiment manipulating interference pattern

Let us suppose we can change the magnetic field and the charge on the interference surface like shown in the picture. Would it be possible to move our interference pattern along the y-axis by changing ...
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A common misunderstanding regarding which path information in a double slit and Mach-Zehnder interferometer?

I just can't get my head around this. What does he mean when he says that a hit at one of the detectors doesn't imply that the particle went though a certain path? He calls this the "separation ...
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Double-slit experiment: particle sizes / properties? [duplicate]

I only have very limited knowledge and understanding of quantum mechanics, and you might know that, for topics one has no expertise in even trivial information is buried underneath thick layers of a ...
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Double slit diffraction and interference patterns

i'm a highschool physics student trying to understand diffraction and interference etc. I'm confused about this (in the context of the double slit experiment): if an underlying interference pattern ...
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Unable to understand why diffracting an unpolarised source of monochromatic light through a single slit causes the emrgent wave to coherent

So in Young's Double slit experiment the source of light that passes through the double slit must be monochromatic and a coherent source (from my undertanding, this is to get a uniform pattern ...
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Single slit then double slit [closed]

I am quite aware of what the intensity patterns will be on the screen for a single slit and a double slit experiment. However I have a hard time grasping the consequence of the intensity patterns when ...
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Interference using three slits

Lets say there is a Young double slit interference apparatus, but with three slits placed at $y= - d$, $0$, $d$, and where the screen is at $X = D$ parallel to the $y$ axis. Can there be any areas on ...
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Sequential Double Double Slit Experiment?

Let's say you arrange the double slit experiment so that there are two sets of two slits one after the other. Like so: ...
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Double Slit Eraser - does the wave function collapse and restore or never collapse

This video shows a rudimentary double slit eraser experiment. He sends photons through a double slit with a polarization film before the double slits (with a 90 degree difference) to obtain "which-way"...
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Scully’s DCQE paper 1999 - reasons for phase shift

http://Arxiv.org/abs/1103.0117 Or better Google the paper using string: arxiv:quant-ph/9903047v1 In order to “see” (detect) the interference pattern we have to take care about the shift of Lambda ...
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Diffraction: What actually happens in the slit

I’m not a physicist but a curious reader, and I’m trying to understand the slit experiment it all makes sense if I accept that the slit itself has no active affect ... can any one explain what ...
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Multi electron interference in double slit experiment

Electrons have negative charge, and therefore repel each other. That should mean that their position, and momentum probabilities should get skewed away when in the presence of some other electron. I.e....
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Are Robert Lanza's claims on Quantum Mechanics in his book “Biocentrism” accurate?

in his popular (pseudo-science) book Biocentrism ch.8 (see here, scroll down to "the most amazing experiment") Biologist Dr.Robert Lanza makes a number of assertions on quantum mechanics based on ...
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Double slit experiment with quarter wave plate and polarization detector

I read in a book the following assertion. In a double slit experiment photons are passed through the slits and detected at the end plate. Each of the two slits has a quarter wave plate which alters ...
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Time of detection for single-electron double-slit experiment

Consider the single-electron double-slit setup, where an electron gun fires a single electron, and a dot is observed on the detector screen behind the slits. We do not place any detector in the slits. ...
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In Young double slit experiment, if whole of the space between the slits and the screen is filled with some optical medium (excluding air and vacuum)

Then a slab is introduced in front of one of the slits. What will be the path difference offered by the slab? The equation must be, according to my school teacher: $$\left({n/n'-1}\right)p=d\sin\...
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If I know in advance I'm getting an interference pattern, wouldn't I have time to remove the splitter so the which-path information would be know?

Check the image below, from this excellent explanation of the quantum delayed eraser. My question, and please forgive me if it is a naive one, is that first the photon reaches detector A, which tells ...
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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/...