# 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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### Can the double-slit experiment be explained as a limitation of the measuring apparatus? [duplicate]

Noob here. I'm struggling with the idea that the wave function collapse upon observation in the double-slit experiment is merely due to a limitation in our measuring apparatus. To draw an analogy, ...
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### How to double-slit experiment with an observer at home?

I decided to conduct Young's experiment, double-split experiment, observer effect. I bought a laser pointer, cut slits in the foil with the blade, as it should be. And this is what I got: Light ...
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### What Does Feynman Mean When He Says Amplitude and Probabilities?

In Feynman lectures on gravitation section 1.4, he tries to debate over whether one should quantize the gravitation or not. He provides a two-slit diffraction experiment with a gravity detector, which ...
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### Modified two slit diffraction experiment

I thought up a slight modification to the classic two-slit experiment that would be fun to try, but I am certain that I am not the only person to consider it, and would like to know if it has already ...
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### Superposition of photons entering human eyes

Based on the Double Slit Experiment and the Mach-Zehnder Interferometer is it reasonable that a single photon enter both eyes of one person?
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### Double-slit experiment with accelerating charged particles

As I understand, charged particles that are accelerated will emit photons. I assume that it is possible to set up a double-slit experiment where the particles, say electrons, are accelerated from when ...
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### Is it possible for a double slit experiment to create an interference pattern at 90 degrees?

If the light diffracts perpendicular to the slits, then would an interference pattern 90 degrees from the slits be observed?
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### Whats wrong with concept of "faster than light" information transfer device? (not about technical implementation, just about theory) [closed]

Yesterday, while lying in bed, an idea came to me, and I don’t understand why it won’t work? Setup: 1.1) Two infinite stores of entangled pairs of photons, each connected to a double-slit device. 1.2)...
1 vote
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### How practical double slit experiment deviate from the young double slit experiment given in a basic physics textbook?

How practical double slit experiment differ from the young double slit experiment given in a basic physics text book? Will there be any difference in the appearance of fringes ? An elaborate ...
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### QFT and double slit experiment - what is interfering with itself?

To my understanding, in QM particles can interfere with themselves because we imagine the state of a system not as specified by the particles position and momentum (like classical mechanics), but ...
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### Amplitude of light in double slit experiment

While reading about double slit experiment I have found no article where the amplitudes of light at the board ( on which light falls) is calculated . Only the fringe width and intensity ratios are ...
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### Why does classical physics not predict particles in the double-slit experiment to land in just two different locations?

I stopped being able to understand the double-slit experiment way before any of the interference and associated "quantum weirdness" came into play. I get that one needs to approach this ...
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### Quantum eraser experiment in enclosure if data is not recorded, destroyed, or encrypted

I'm trying to understand something precisely and finding it difficult to trust videos on YouTube, conversations on Reddit, etc. This existing question actually comes very close to mine: Quantum eraser ...
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### Would observation affect the results of a double-slit experiment if the observation isn't recorded?

Given that, when an electron passes through the double slit experiment without observing the slit it goes through, it produces an interference pattern, and that, when you do observe which slit it goes ...
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### Observation in Young's double slit experiment [duplicate]

I'm new to YDSE and recently I found out that there was also an experiment done when humans were able to separate photons (What I mean is we were able to shoot photons onto the double slit) so it was ...
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### Diffraction of a double slit where the slits are far apart

I'm trying to figure out how I can possibly know the real equation of the intensity of the diffraction pattern of a double slit (I don't care about interference for now). Here are my thoughts: ...
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### Double slit experiment with polychromatic light

When double slit experiment is carried with white light , the resulting pattern on the screen is predicted by assuming white light as combination of light of different colors. Then it is assumed that ...
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### Why diffraction is not happening?

Recently i encountered a problem on the Young's Double Slit Experiment. The question was paragraph and had multiple sub-parts on the different variations of the experiment. One of them was about what ...
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### Young's double slit experiment with two glass slabs

Suppose I place two glass slabs with different thickness and refractive indices in a YDSE setup. I was told that if $$(\mu_1-1)t_1=(\mu_2-1)t_2$$ then there would be no change in the interference ...
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### Why in the experiment of double slits, in case of radiation of wavelength of red light, we can observe an envelop of the minimum?

I have made an experiment in which i have to measure the intensity of the light generated by an $\text{He-Ne}$ laser, in the case of two slits, I pretend to observe an interference lattice. I have to ...
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### How do we know that the double slit experiment can’t be explained by a deterministic theory?

Bell’s inequality applies only to very specific kinds of systems where there is entanglement and non local correlations. Those phenomenons are by every account special. As far as I know, there is no ...
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### Necessity of Coherence for Interference in the Context of Indistinguishable Photon Paths

I've been studying the interference phenomena observed in the double-slit experiment and came across a concept that piqued my interest. It is well understood that for interference patterns to form, ...
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### Is the $n=0$ antinodal line in a double slit experiment constant loudness at all points?

If we assume a normal double-slit experiment with two speakers that produce identical sound waves, is the $n=0$ antinodal line going to have a consistent loudness wherever point on it? As the crest ...
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### Where is the paradox in the double-slit experiment?

I'm aware of the fact that Feynman said something along the lines of "If you don't think QM is weird then you don't understand QM". So I'm pretty sure he is right and I am wrong :) Still, ...
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### Why do we only consider two points in Young’s double slit experiment?

Say we have two slits in the xy-plane. The x distance between them is d. Why do we, when calculating the resulting amplitude of the wave, consider only the phase difference of two secondary radial ...
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### Calculating net phase in single slit diffraction

I want to calculate the net phase at a point on the screen in Fresnel diffraction. Attached below is a rough diagram if needed. For this I considered hypothetical $n+1$ small slits acting as sources ...
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### What is the relationship between an electron's wave-like and particle-like qualities? Is "Electrons are waves and particles" the whole truth? [duplicate]

Upon researching the double-slit experiment, it seems to me that electrons are somehow cloaked in wavelike behavior (not at all like my previous idea that electrons were waves and somehow were also ...
1 vote
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### Interference pattern of relativistic particles

I wanted to know if it is possible to perform a double slit experiment with electrons travelling at 0.99c as the wavelength is very short.
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### In the double slit experiment, why doesn't the electron interact with the wall or plate with the slits and therefore act like a particle? [closed]

I always wondered if the electrons superposition is so fragile, why doesn't it interact with the wall or plate with the double slits? Do the slits have to be a certain size?
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### How is the interference pattern of the double slit experiment quantitatively measured? [closed]

The single photon / single electron double slit experiment shows particles appearing as dots on the screen. This is explained as being due to the collapse of their wavefunctions. However, if they were ...
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### Can a CCD work in time integration regime?

Can one use a CCD in same way as photosensitive paper? When one has very low intensity like in single photons double slit experiment to see the interference pattern one puts a photosensitive paper at ...
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### How come two electrons interfere? [duplicate]

This is something I have read many times that the double slit experiment done with electrons produce the same pattern that we get with light i.e. the electrons undergo superposition similar to that of ...
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### Double slit experiment: deduce "path" information based on where the particle hits the wall?

Say it's a normal double slit experiment, and the particle is detected on some position on a wall after the slits. How much info could be deduced from the position? I know it's not exactly a path per ...
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### Can the probability of finding a particle in a certain finite region be zero?

Don't worry this time isn't about doubleslit but I'll still use it for my question. Imagine an electron is emitted from the source and I shall allow a certain amount of time to lapsed so as to provide ...
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### Path lengths in the dual slit experiment and the speed of light

In the dual slit experiment, we can view the diffraction pattern as the constructive and destructive interference of two waves from the superposition of a single photon. If we analyse the paths ...
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### Shift in image caused by refraction in normal image formation and shift in fringe (youngs double slit experiment)

for shift in a image from its original position due to a slab of thickness $t$ and refractive index $u$ is given by $shift(s)=t[1-1/u]$ and for shift in fringes formed during youngs double slit ...
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### Can the Aharonov-Bohm experiment also be described by conditional probablilties, like the simple double slit?

The most attractive description of the double slit experiment for me is that in Beltrametti and Cassinelli's book.$^{[1]}$ The essence of their description is the following. Beltrametti-Cassinelli ...
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### Is there a limit to maximum or minimum wavelength which can be measured using double slit experiment?

Please correct me if I am wrong. In a double slit experiment, in order to measure wavelength,there seems to be a minimum size of slit (e.g hydrogen atom) and on galactic scale there seems to be an ...
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### Will the interference pattern still be observed with gamma rays in double slit experiment?

I am little confused. Please correct me if I am wrong. Gamma rays can produce electron and positron pair if they interact with atoms. In the double slit experiment the final screen where interference ...
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### Is the nature of light determined? [duplicate]

Is it determined that light is a wave or a particle or it still exists as a dual nature? because young's experiment said that light is a wave but still I hear people saying that light shows both wave ...
1 vote
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### Understanding different approaches to the double slit experiment in Quantum Mechanics

I've been studying the double slit experiment, particularly focusing on the approach that involves solving the Schrödinger equation for a free particle in two spatial dimensions. Specifically, I'm ...
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### Does interactive measurement of a "particle" in a double-slit experiment affect what happened before that measurement

Yep, yet another question about the infamous "double-slit" experiment. I've read all the similar questions that pop up before submission of the question. I've read plenty :) over the years. ...
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### What are the similarities between a beam splitter and a double-slit?

More generally, my question is about the similarity between an $N$-slit and an $N$-mode beam splitter. Conceptually speaking, would it be accurate to say that the beam splitter is just the discretized ...
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### On the Double-Slit Experiment

In the double slit experiment, a source of particles is pointed towards a wall with two thin slits, the state of the particle before a dot appears on the screen is represented by a linear ...
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### Double slit experiment but submerged in solution

Imagine the familiar setup of the double slit experiment using laser but it is submerged in a tank filled with water, would there be any interference pattern? I also read somewhere that tonic water ...
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### Double slit experiment confusion regarding "single" electron being shot toward the slit

I have heard many lectures claiming that even a single electron being shot toward the slits will eventually lead to construction of an interference pattern. The rationale for firing one electron at a ...
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### What is meant by "observing the photon's path" or "observing which slit a photon passes through" in double slit experiment?

It is said that in the double slit experiment one will prevent the interference of the photon with itself by simply observing which path the photon. Here is a very first Google result for "double ...
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### If two people perform the double slit experiment, why does the pattern disappear for both if only one observes which slit the electron goes through?

In the double slit experiment, one can observe which slit the electron goes through with a flash of light as the electron is scattered by a light source behind the screen. Whenever we know which slit ...
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### Double slit experiment with kits at school

I've just done a double-slit experiment in our school club using a simple kit with a pair of razor blades and a laser pointer. We put the razor blades together, cut a double slit in a clear film, and ...
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