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.

learn more… | top users | synonyms

1
vote
3answers
53 views

In diffraction process, how to describe the edge in the sense of particle-wave duality?

In diffraction experiments photons show behind an edge intensity distributions in the form of fringes. It seems to be without doubt that the edge is a part of the game. My question is, how to describe ...
1
vote
1answer
99 views

Can the wall in the double-slit experiment be considered to perform a “half measurement”?

When talking about the double-slit experiment, most physics books consider the wall to be a infinitely high potential, so that the photon is either reflected or transmitted through one of the slits. (...
1
vote
1answer
70 views

Single particle passing through the double slit at a time [duplicate]

In modern experiments, With the classical setup of photons or electrons passing through double slit, the intensity is kept extremely low, such that one can detect a single particle passing through ...
1
vote
3answers
136 views

Double slit experiment

What's the simplest way to describe and show the double slit experiment? I have to perform an experiment proving how it all works in my physics class.
1
vote
1answer
312 views

Possible Answer To The Double-Slit Experiment [closed]

I think I might have figured the double-slit experiment out. I am not going to explain it here, Google it if you don't know it. If I am wrong please tell me why: Matter are relative to observers ...
1
vote
1answer
356 views

Delayed Choice Quantum Eraser [duplicate]

All delayed choice quantum eraser experiments I've seen record the signal photons reaching detector D0 and then use the data of the idler photons recorded at detectors D1, D2, D3, D4 to "filter out" ...
1
vote
1answer
144 views

Double slit experiment from first principles of QM

I have read many descriptions of electron double slit experiment but I could not find the description from the first principles of quantum mechanics. Most of the descriptions makes comparison with ...
1
vote
2answers
177 views

Are there new concepts for the explanation of the wave-particle duality?

Whenever we can observe photons immediate, they are particles. That includes that photons have a inner structure with periodically varying electric and magnetic fields. The EM field of a radio antenna ...
1
vote
1answer
200 views

Relationship between the material properties of an edge and the fringes behind this edge

The double-slit experiment shows fringes on a screen. Closing one of the slits there is still an interference pattern on the screen behind the slit. Making the slit wider we still see fringes between ...
1
vote
1answer
114 views

Yet another Young Double Slit Experiment

If I have a laser light incident on the double slit at an angle O < 90 what kind of interference pattern will I see? Will i see the same with less intensity or different pattern?
1
vote
1answer
171 views

Does double slit in a vacuum have any effect?

If you do the double slit experiment in a foggy or smokey room, it seems like your going to smudge out the interference pattern, right? Continuing in the other direction it seems intuitive that a ...
1
vote
1answer
377 views

Electron double slit experiment and the electric field

In the electron double slit experiment, why is it not, in principle, possible to know which slit the electron went through by the electron's effect on the surrounding EM field? As the electron ...
1
vote
1answer
1k views

Infinite fringes in double-slit interference

My professor told us that the fringes formed by interference will always be countable or finite. But I am just wondering, if, it is possible to have infinite fringes? Is there such a case? I am ...
1
vote
2answers
141 views

Is the beta barium borate crystal an observer in the delayed choice quantum eraser double split experiment?

I'm a little confused about the top answer to this question: Variation of delayed choice quantum eraser He says "if you simply detect all signal photons and make no distinction between them, there ...
1
vote
1answer
250 views

The Double Slit Experiement

The equation for the double slit experiment requires an approximation in naming the two angles used to both be theta, correct? I feel like the majority of equations are exact relations, and it just ...
1
vote
1answer
89 views

State emitting from an extended thermal source

This calculation is for a double slit experiment setup which is experiencing a far field radiation from an extended monochromatic thermal source. I assume the source is 1-D and it's length is $b$. ...
1
vote
1answer
201 views

How is wavefunction probability redistributed after partial wavefunction collapse?

Suppose I set up the double-slit experiment using photons as my particle. Behind the left slit I place a beam splitter that points some of the light off in the direction of a camera (represented as <...
1
vote
1answer
142 views

Where can you get a photon detector?

Say I'm doing the double-slit experiment with photons as the particle and want to add a detector just behind each slit to eliminate the interference pattern. Where would I get a detector like that?
1
vote
1answer
148 views

Matter wave of multiple particles of different types

I am slightly getting confused on the following issue: When performing double-slit experiment of electrons, a screen allows the matter waves to be detected as particles. And as we all know that ...
1
vote
1answer
4k views

what is phase angle of wave function $\phi \,$?

this is wave function: $$\Psi{(\vec r, t)}=\Psi_0 e^{i(\vec k \cdot \vec r-\omega t)}$$ $$\Psi{(\vec r, t)}=A e^{i(\phi + \vec k \cdot \vec r-\omega t)}$$. what is phase angle $\phi$ of wave ...
1
vote
1answer
1k views

How Light or Water Intensity is equal to square modulus of wave function of Light or Water Waves $I=|\psi|^2 \,$?

I've seen the Wave Function as a psi $\Psi$ $\psi$. And always heard that the wave function is the Complex Number as Imaginary and real number. But I've never seen it I've never seen components of ...
1
vote
1answer
147 views

What kind of interactions denote 'observation'?

I'm quite perplexed by the notion of 'observation' in regards to the collapse of a particle's probability wave. Does a particle's wave only collapse when it is involved in a strong interaction (such ...
1
vote
1answer
394 views

Double-slit experiment with alternating on-off switch

Suppose we perform a double-slit experiment with a detector placed at a position of minimum intensity (maximum destructive interference), off-center where the path lengths differ by half a wavelength. ...
1
vote
0answers
34 views

Firing Single Photon [on hold]

We know (or pretend to know) what will happen if we fire one photon at a time and let it pass through slit/slits. But what if we don't use slit/slits and fire photons one at a time at a screen? What ...
1
vote
0answers
45 views

Does anyone know how/where I could view the Double slit experiment in person? [closed]

I want to see the double slit experiment in person! The one where the observer effects the wave/particle state of an electron. Where would I be able to view this experiment? Is it on display in any ...
1
vote
0answers
34 views

Is it possible to create a double slit experiment that can predict when photons have 'likely' passed through the slits?

This question asked:Is it possible to determine the slit a photon went through in the double slit experiment by measuring its flight time? My question is similar, but doesn't require such detailed ...
1
vote
2answers
43 views

Evaluating double-slit experiment for wave-particle duality

Is it possible that the wave-like behavior of particles in double slit experiments is just an outcome of particle distribution? Can we regard or treat a normal or Gaussian distribution as wave-like? ...
1
vote
0answers
54 views

How does the two slit experiment work?

Whilst going through 'A brief history of time', I faced difficulty in understanding the two slit experiment. How can an individual electron cause fringes on screen? I was unable to understand it? ...
1
vote
0answers
33 views

Double-Slit Experiment /w Switch

So if you perform the double-slit experiment without detection, you'll see an interference pattern. If you interfere with a photon at the slit, you'll see the wave-form collapse. So if you turn the ...
1
vote
1answer
37 views

Does the number of photons reduce after hitting the wall in the photon by photon double slit experiment?

In the photon by photon double slit experiment like done here, It cannot tell us whether or not there are some photons that are not detected by camera but they actually hit the wall in some kind of ...
1
vote
0answers
41 views

How exactly is detection done before the slit in the double slit experiment?

We commonly hear that in the double slit experiment, detection of which slit the photon/electron passes through when the the detector is positioned before the slit, collapses the wave and results in ...
1
vote
0answers
52 views

How does illuminating only one slit in the double slit experiment remove the interference pattern?

You know the familiar setup: Strong light source behind a wall with two slits in it, electron passing through. If the photon encounters the electron after it's passed through hole 1, then the electron ...
1
vote
0answers
39 views

If we forget which slit the photon goes through, does it interfere again?

Okay, this highly hypothetical, since forgetting is basically impossible. I am just testing my understanding of quantum mechanics, this exact experiment is basically impossible (although there may be ...
1
vote
0answers
37 views

Modified double slit experiment with single entangled particle [closed]

Say we use one of the entangled particle (A) for the experiment, if we measure the other particle (B) would particle (A) still be able to exhibit interference pattern since physically only the ...
1
vote
0answers
141 views

What happens to the Fringe Width when the velocity of electrons passing through the slit in Young's Double Slit Experiment increases?

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 ...
1
vote
1answer
103 views

Double slit experiment mechanism

Can someone explain the mechanism that sets in motion the electrons in the experiment? Is it an electro-magnetic force? If so, I think it's not right to describe the motion of the electron as a '...
1
vote
0answers
28 views

Could reflected sychrotron radiation guide electrons in the slit experiments? [closed]

When electrons are accelerated they produce synchrotron radiation. An electron traveling from the slit toward a detection screen will produce photons along the way. These photons will radiate toward ...
1
vote
0answers
58 views

Two double slit experiments after each other

Does the act of observation forever destroy a photon or electron's wave like behaviour? What would the result be if the electron was observed, and instead of displaying the two lines or particle like ...
1
vote
0answers
31 views

At what point do quantum wave functions collapse? [duplicate]

At what point do quantum wave functions collapse? Let me give you two examples to make that question more clear: Let us think of the double slit experiment. We humans see the light at certain ...
1
vote
0answers
60 views

A follow up on “Double Slit Experiment in a Bubble Chamber”

The exact title is "Has a double slit experiment ever been done using a track chamber or even contemplated?". I was totally unfamiliar with the concept of the bubble chamber, so I did some amateur ...
1
vote
0answers
31 views

Does the double split experiment set boundaries to the concept of localization?

Feynman's textbook on quantum mechanics starts with the double split experiment for single electrons, see chapter 1-5. The astonishing result is the self-interference of the single electron as long as ...
1
vote
0answers
50 views

How to arrive on the diffraction pattern for the double slit experiment using path integrals for the Gaussian slit case?

I wish to take the path integral route to derive the diffraction pattern for the double slit experiment using the Gaussian slits as the nature of the slits. The kernel looks like: \begin{equation} K((...
1
vote
0answers
165 views

YDSE and diffraction

In a single slit diffraction experiment we know that light bends around the edges. So can we treat Young's double slit experiment (YDSE) as a two slit diffraction since we're using two slits in that ...
1
vote
0answers
62 views

Physical reality of calculated wavelength from the two measurable phenomena slit distance and fringes distance?

I see some difficulties in answering this question (Have we really measured the wavelength of light?) about the measurement of the light's wavelengths with double slit interference. "... we can find ...
1
vote
1answer
93 views

Understanding a modified “delayed choice quantum eraser” experiment?

Pardon my ignorance, but I am really interested in understanding the quantum mechanics and it's interesting implications, but clearly I don't, since I keep coming up with violations to many physics ...
1
vote
0answers
23 views

Stress testing Quantum Uncertainty, a multi Phase Question

I start this line of thinking i begin to seek the right questions to ask. I am of humble origin, but even here i remember that it all starts small somewhere. I think that even the greatest minds ...
1
vote
1answer
97 views

Double slit experiment query

Seen as thought empty space in a vacuum is not empty is it not possible that the gluon fields that remain affect the trajetory of an electron when carrying out the double slit experiment affecting the ...
1
vote
0answers
180 views

How can Young's double slit experiment explain the wave nature of light?

I've been reading about wave theory of light and the famous experiment performed by Thomas Young. But how does this experiment prove that light is a wave ?
1
vote
1answer
1k views

Energy Dispersion in Young's Double Slit Experiment

In Young's double slit experiment, when you see the diffraction pattern, why does the intensity of the light fade out as you move from the central maximum? I think it has something to do with the wave-...
1
vote
0answers
284 views

Can the diffraction/interference pattern behind the slit (double slit) be calculated with Feynman path integrals (QED)?

I often see Feynman path integrals explained by a graphic which shows the slit and then the electron goes all possible ways behind the slit. Ok that is nice to understand the Feynman path integral, ...