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 are electrons distributed on the screen in the double-slit experiment with an observer?
As I understand it, when both slits are open, the electrons spread out in an interference pattern, and if one of the slits is closed then the electrons are spread out according to a single-slit ...
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How reversing physics law helps us for electrons in double-slit experiment? [closed]
In the double slit experiment, we got an electron detector screen. Now, there’re 2 cases:
If we don’t have an electron detector screen (which means we don’t “look” at and interfere with electron in ...
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Does Time Delay Between Particle Emissions Affect the Double-Slit Experiment?
Has there been any experimental confirmation that the time delay between the release of individual particles doesn't affect the resulting interference pattern in a double-slit experiment? If so, could ...
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In the double slit experiment, when emitting one photon at a time, why don't all of them travel the same path?
If we fire one photon at a time, why don't all of the photons hit the barrier exactly in between the two slits? How come each photon goes in different directions? (some go through top slit, some go ...
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What happens to an electron's wave function in a double slit experiment, when one tries to figure out which slit the electron went through?
The wave function collapses anyways whether I wanted to know which slit the electron passed through or not, the only difference there is that in the former case the wave function collapse for any ...
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In single slit diffraction, why does the minima occur at integer multiples of lambda, which is contrary to double slit?
Single slit diffraction is also a kind of interference, so why does the minima do not occur at a path difference with half the wavelength, but occur at integer multiples? In my lecture notes, it says ...
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Why when not observed in the double slit experiment, do we see light in places we do not see light when observed?
The double slit experiment with a single electron provides a different result when observed and when unobserved. When unobserved we see an interference pattern, and when observed we just see 2 lines. ...
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YDSE fringe pattern for point source [duplicate]
I read that the fringe pattern for point source in YDSE is hyperbolic. What is the mathematical proof that the curve represents a hyperbola?
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Is the double slit experiment near an event horizon really a paradox?
I read an article that referred to the idea that a double slit experiment near the event horizon of a black hole observed by someone inside the black hole creates a paradox because the inside observer ...
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Do these two separate light pulses (in sequence) interfere in this scenario? Why or why not?
This question is inspired by the recent "double-slit experiment in time" experiment that was popularized. See here and here. I have not looked into the original paper in detail, so my ...
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What is the profile picture of the double split interferences: from "far", up to the wall with holes through this one, and until we reach the emitter
I would like to know what are "scientitifics" therms to explain better what I mean.
I mean we do a cross section, normal to the trajectory of photons and we make it changing position all the ...
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Is Wigner's friend paradox more paradoxical in this situation?
In the Wigner's friend paradox scenario, there is an observer inside a lab, with a spin 1/2 particle inside waiting to be measured, which is generally in a superposition of spin up and spin down ...
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Have Zeilinger's hot $\rm C_{70}$ buckyballs classical properties?
Zeilinger showed experimentally that increasing temperature of $\rm C_{70}$ buckyballs causes the interference pattern in the double slit experiment to smear out increasingly.In other words the ...
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Gravitational Waves and Pilot Wave Theory
If gravitational waves interfere with each other, and gravity is the warping of spacetime by the presence of matter, wouldn't thus waves cause the interference patterns seen in the double slit ...
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Which will be the experimental error in this ripple tank experiment?
I am having some issues while setting my experimental error in a ripple tank experiment where we are studying the interference in multiple slit.
I already know that it is not the most accurate ...
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Observing a Superposition in the Double-Slit Experiment
Consider a standard double-slit experiment using light, where $|\Psi\rangle = \frac{1}{\sqrt{2}}(|L\rangle +|R\rangle)$ may represent the superposition state of a single photon passing through 'both ...
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Quantum experiment design question
Is there a way to design a double-slit experiment such that, if you put a detector in one place it indicates collapse, and in another case it indicates superposition, and you can extract information ...
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Light wave interference on thin film
Let a point P exist just above the surface of a glass slab of thickness $L$.
Light is incident vertically on this slab. The light at point P, at some instant has phase angle $\phi$.
The refracted ...
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What is the difference between the J.P Thomsons and double slit experiments for particle wave duality in electrons?
My textbook is very unclear on why the dual particle wave in electrons was discovered by the Thomson experiment. I don't understand why they first show me the Thomson experiment for the proof of this ...
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Double slit experiment outcome changing by observing the slits
my question is as I believe quite simple since I'm new to physics. However here it is: if we take a double slit and constantly shoot helium atoms on it with a constant speed one by one we will see a ...
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Wavefunction evolution in a Double-Slit setup after detection
If a detector is placed at one of the slits in a double-slit setup, the probability density reduces to a bright fringe opposite the detector which went off. I want to understand why this happens from ...
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How can there be total destructive interference after a Wick rotation?
My question is exactly this one from Physics Forums, but I don't see any duplicates on SE and it doesn't seem to have gotten a clear answer there.
If the Wick rotation switches out the complex $e^{iS/\...
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Do the photons from 43 attosecond pulse lasers produce double-slit diffraction patterns?
Laser pulses have been produced at the range of 43 attoseconds. If I'm doing my arithmetic correctly, this represents 12.9 nanometers at the speed of light.
And, if I'm understanding the link ...
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Why doesn't the double slit experiment disprove general relativity? (or vice-versa for G.R. tests with Q.M.) [closed]
I learned that General Relativity and Quantum Mechanics are fundamentally incompatible models of the world, yet we have observations with evidence for both. Thus, I am confused about why we cannot ...
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How do you account for all the photons and plethora of quantum particles in the box between the double slits and the back wall?
Does the particle being shot not interact with the all the particles that must be consuming the space in the box before the back wall? How do we know it’s the same photon traveling the distance to ...
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How does the intensity of light in a double slit experiment vary with the slit width?
I know this question has been asked quite a few times on the network but I still can't find a concrete answer. It's quite clear that intensity depends on the square of slit width in a single slit ...
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Double-slit experiment: How do we know the particle effect comes from the nature of light rather than its interaction with the detector?
In the double-slit experiment, we shine a light wave through two closely-spaced parallel slits at a screen, and observe an interference pattern on the screen. We then reduce the intensity of the light ...
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Best configuration of double slit experiment in a ripple tank?
I'm carrying out an experiment about interference and diffraction with double slit (multiple slits in a future) in a ripple tank.
I have the chance to 3d print the slits so I'm thinking about the best ...
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Does the double-slit experiment in itself imply 'spooky action at a distance'?
Silly question, but when sending a single electron at a time through a double-slit and observing the interference pattern over time ... how does the single electron that popped up ('measured') at a ...
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All double slit experiment explanations are bad
If I aim my laser at the wall in front of me, I will not see it showing up on the wall left to me.
Now with the double slit experiment. When you say a beam of light, ok a thick beam of light passes ...
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In the double-slit experiment with single electrons, do some of them hit the screen just behind the material between the two slits?
In the double-slit experiment with single electrons, are there electrons which hit the screen at the spot which is just behind the material between the two slits?
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Double-slit experiment with molecules and interference pattern
Is it true that in the double-slit experiment with molecules a which-way measurement is performed and the interference pattern is not destroyed?
We know exactly which slit the molecule goes through.. ...
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Why does the double slit experiment not prove that the wave function is ontological?
To me, it seems that the interference pattern is the evidence that the wave function is a physical aspect of reality, but people still seem to be trying to decide whether or not it's ontological or ...
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Is measurement and observation the same as processing data? [duplicate]
My understanding is that "observation" and "measurement" cause quantum wave function collapse. Can something be "measured" or "observed" without a process ...
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How do you shoot single photons randomly to a screen?
One of the very first basics of the double slit experiment is that you have a single photon source that is directed at a reference screen. There, in contrast to the physics of e.g. a pistol bullet, ...
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Can red and blue light interfere to make fringes in young’s double split experiment?
Supposing in young’s double split experiment, I cover one slit with red filter and the other slit with blue filter. The light coming out from the first slit would be red and the second slit would be ...
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How is the slit material not considered an observer?
As far as I can tell, the essential process of "observation" is that there is an interaction with something else, providing a means by which any part of the universe noticed something about ...
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How do travel times of electrons during a double slit experiment behave when looked at from distinct places on detector?
Let's say we have a standard double-slit experiment setup. We are firing electrons through 2 slits at the screen of the detectors.
Since the detector is flat, from classical mechanics' perspective ...
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If $I$ is the intensity of the principal maximum in the single slit diffraction pattern, then what will be its intensity if the slit width is doubled?
I've found a few results on the internet for this question, all with different explanations or different answers. Some say it'll become 4I and some that it'll not change. I see that there are a few ...
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Absorption of a delocalized photon
I was thinking about the photon double-slit experiment recently, where a single photon is passed through two narrowly-spaced slits so that it delocalizes (passes through both slits), undergoes ...
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Diffraction of a laser composed of 2 monochromatic colours through a single slit / $N$ slits
To make the example simple, let's say we have a yellow laser that is the combination of 2 monochromatic lasers (green + red). In the example I will give, let's consider that the slits are narrow ...
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Does Heisenberg Uncertainty Principle allow for retroactive calculation of both at the same time?
Hi! I've been having this pestering question about the double slit experiment stuck for too long in my head and it's quite annoying, could use some help.
SO. If you had an electron gun that sent only ...
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Double slit question - wavefunction collapse
If we fire photons at the double slit, we see an interference pattern on the screen. We know that if a quantum system interacts with any outside object (such as a detector, etc), its wavefunction ...
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Interference pattern when the phase difference is 90°
We all know that entangled particles in polarisation will never make an interference pattern, in double slit setup with two orthogonal polarisers on either slits(say one slit with linear polarisers ...
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Why doesn't a double slit act like a single slit?
Well, a single slit can be considered a continuous array of sources, and thus its spectrum is different than that of a double slit. But why is a double slit so different from a single slit if it is ...
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Do the photon and surface electron fields in the double slit interact even if there is no absorption
This was a question on PSE „Do the photon and electron fields interact even if there is no absorption?“
I am talking to a friend about why light travels more slowly through glass. We came to the ...
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In slit experiment: is it one wave function before and two wave functions after the split?
Forgive my round-about background to the question: I'm curious how the experiment "fires electrons slowly that interact with themselves"... I'm thinking that's just a simplification?
I feel ...
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Why the double slit pattern is a blurred image instead of two strips?
I am complete dilettante in physics, when i was first introduced to quantum mechanics by a You tuber named Arvin ash, he explained about the double slit experiment with quantum particles, there in his ...
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Is there any relationship between cross-terms in QFT and double slit experiment?
Suppose I have a fermion-fermion interaction with two channels $t$ and $u$, the matrix element is $\tilde M$ = $\tilde M_t + \tilde M_u$. Then when we square the matrix element, we have $$\sum_s\tilde ...
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Double slit experiment with polarised light
If I had a double slit, and one slit is covered with vertical polariser, and the other with horizontal polariser, and a +45° polariser placed after the double slit (in between the screen and the ...