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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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What is the intuitive reasoning behind a factor of 4 in the Fraunhofer double-slit intensity equation?

For Fraunhofer diffraction, the intensity of a single-slit scenario is described by the following equation: $I(\theta) = I_{o}\left [\frac{\sin(\frac{\pi a}{\lambda}\sin(\theta))}{\frac{\pi a}{\...
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Double slit experiment gun precision

If instead of a gun that the progectile can go to either slit, if a long barrel, very precise shooting device, capable of consistently shooting thru one slit. 100 % . Now the two slits are set up and ...
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Double slit experiment: What if the detector is removed before the photon reaches the slits?

I've been reading/watching a lot of stuff about the double slit experiments. I was watching a youtube video about the delayed quantum eraser experiment and it was really interesting and got me ...
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Momentum of a Quantum Wave

When single photons are repeatedly fired through a double slit apparatus, eventually an interference pattern emerges on the detector, suggesting that each individual photon actually propagates as a ...
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When does the exchange of energy take place in the Quantum Eraser experiment?

I found this PBS video regarding the delayed choice / quantum eraser experiment, which, like all the others I've seen, states that the interference pattern generated by the photons that pass through a ...
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Double Slit Experiment and Delayed Choice Quantum Eraser - light and time

In the double slit experiment, there's observing or not observing. You observe, and get the particle pattern. You don't observe, and get the interference pattern. Light travels at the speed of ... ...
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Binomial Distribution and the Two Slit Experiment

Are there any correlations between the probability of binomial distribution and the results of the two-slit experiment?
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Double slit and Quantum eraser

I understood that, after the photon passes through the double slit, and before it lands on the screen, if the Quantum eraser is activated, there will appear the interference pattern due to the loss of ...
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The opposite of interference pattern of conventional double slit experiment

Given an interference pattern which is the exact opposite of the interference pattern of the double split experiment (points where delta r = nλ (n=0,1,2,...)are totally dark and points where delta r = ...
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Which-way experiment with electrons

Consider the double-slit experiment done with a stream of electrons, sent individually toward the double-slit screen and detection plate. A moving electron is a moving electric charge, which by ...
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Do Photons Ever Form Just Two Lines In Slit Experiments?

Are there any slit experiments where the photons only make two lines on the screen, as if they were little bullets fired though the slits? I have conducted many double and single slit experiments and ...
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De Broglie Wavelength interpretation

I've just started learning about the double slit experiment (just in the short appendix section in Schroeder's Thermal Physics), and I'm extremely confused by this one thing: In it, out of basically ...
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Would the double slit experiment still yield the same results if the electron were travelling really slowly?

And I mean really slow. I don't know how this would even be done, but just a thought experiment. To explain why I ask this, the way I understand the phrase "we can't know the momentum and position ...
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What is the physical reasoning behind the mathematical derivation of double-slit interference pattern and single-slit diffraction pattern?

Why is it that there are two different equations for the minima of a single slit diffraction pattern and a double slit interference pattern? In the double slit experiment, the two slits act as two ...
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Why do cylindrical waves create an interference pattern (and sphericals do not)?

I have read this: https://phys.org/news/2011-01-which-way-detector-mystery-double-slit.html It says that elastic scattering creates cylindrical waves, and that creates interference pattern, and the ...
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Double slit experiment and electromagnetic waves

In the double slit experiment you can see the electromagnetic waves as curved lines that go through both slits and interfere with each other. But, don't electromagnetic waves look like this. So, ...
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What makes the pre-slit photon detector act differently than air in a which way double slit experiment?

Using photons for the double-slit experiment doesn't require a vacuum, therefore the photon's wave function either doesn't collapse upon absorption or it's regained upon emission when interacting with ...
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Quintuple slit experiment

What would be the outcome of conducting the following modified double slit experiment? Take the normal double slit experiment with a detector on the double-slitted wall, and behind it, add a second ...
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Wave-function collapse query

A distant star emits photons towards Earth, where they can be detected and observed, however there is a very dense object (a galaxy) directly between the distant light source and our observation ...
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What if we didn't know if particle is observed in double-slit experiment? [duplicate]

The famous double slit experiment shows how light behave like a wave when sensors near one slit are on and recording vs not recording. I didn't find a lot of details, but especially given the case ...
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Path difference in double slit experiment

Generally the path difference between two rays is considered as dsin$\theta and for this generally the two rays are considered parallel. That is shown in diagram 'c'. My questions - 1. is even ...
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Tagging the photons on double slit experiment [closed]

I stumbled upon the double slit experiment. It was very interesting to the say the least. The video stated that when being observed the electrons act as particles rather than the wave because they ...
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Actual double slit

I can't understand what is given here. How is the double slit pattern a interference a two single slit and double slit. If we say it is interference of two single slit then it makes sense. But the ...
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Very Delayed Choice Experiment

I am trying to really understand this experiment. Some talk about retrocausality. Others give a fair explanation of why that is NOT the case. Lets say we setup our experiment, and photons are divided ...
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Young`s double slits experiment

At the constructive points on the screen, their constructive amplitudes are equal. So these points must be equally bright, but they are not! Why does this phenomena happen? NB: I have taken this pic ...
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How to conduct the electron double slit experiment

I am planning to conduct the electron double slit experiment for a project in my school. Even after researching quite a bit online, I wasn't able to find a proper guide that explains the materials and ...
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Measuring quantum mechanics changes the answer and energy?

A thought occured to me thinking about the quantum slit experiment. Upon firing an electron or particle it would impart an opposing force on the machine shooting it. The direction if this force should ...
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Is photon something that already exists before measurement?

Do photons actually exist when electromagnetic waves are travelling, or are they thought to exist only because energy always quantizes when it's measured? And if photons really do exist, how their ...
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In the quantum eraser experiment, is it necessary to have two which-path-erasing detectors rather than one?

In the quantum eraser experiment, why is it necessary to have both D1 and D2? Why not do away with D2 altogether and, as with the standard Mach–Zehnder interferometer, make the photons from BSA and ...
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Higgs Mechanism and Wave-Particle Duality

According to Higgs Mechanism a particle acquires mass when it couples to the higgs field. Now consider Wave-Particle Duality. Suppose I am doing a Young's Double Slit Experiment using electrons. When ...
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Cases of Double slit experiment [duplicate]

I'm a high schooler, and I want to clarify what I know about the double-slit experiment. I broke down the double slit experiment into 4 categories: particle w/one & two slit, and wave w/one & ...
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Double slit and measuring polarization

If you make the double slits experiment and you measure the path the photon went through the wave function will instantly collapse But if you measure the polarity of the photons without measuring the ...
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Can the double slit experiment be answered with Einstein's gravitational lensing effect?

Since the original double slit experiment was done over 100 years ago, it probably wasn't done in a vacuum. I've noticed that the Einstein's lensing effect (or something similar) happens by looking ...
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Young double slit experiment

Can we say that the central maximum is the brightest fringe? If so, to find the width of the central maximum, why can't we say that it is twice the width of the brightest fringe (due to 2 times $\...
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Light double slit experiment

Does the light double slit experiment work equally regardless of it being done in a vacuum or a medium (gas or liquid)?
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Has the double-slit experiment been performed with an antennae detector?

My layman's understanding of one aspect of the wave/particle duality is that when we attempt to detect wave behavior we observe wave behavior, and when we measure to detect particle behavior we ...
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Is it possible in Double Slit experiment that electrons form interference pattern because they interact with edges of slit?

I do understand that wave-particle duality has been established for electrons after finding that it posses wave nature from results of double slit experiment, but is it possible that the electrons get ...
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Polarize light after double slit experiment

Recently, me and a classmate did the double slit experiment in class with a laser, but since we had a polarizer (circular if it matters), we placed it after the double slit, and we observed an ...
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Entanglement in double slit experiment

Suppose we send 2 entangled photons through the 2 slit, does measuring the position of one of the photons affect the other particle's wave function or does the other particle still behave as a wave ?
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Double-Slit experiment and the role of observation in the distribution

so I am still having difficulty understanding the role of measuring/observing the wave function. Many of the videos I have watched says that when we are not looking at the wave function it makes an ...
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Is it possible to control the electron interference of a double-slits experiment by using electromagnetic lens?

As we knew, people can focus or defocus the interference pattern of a photon-based double-slits experiment by using an optical lens. Actually, there are some groups using these to do quantum ...
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Young's double slit experiment with a thin film covering one slit

In the Young’s double slit experiment, one of the slits is covered by a thin film of thickness $d$ and refraction index $n$. I want to determine the phase difference of the waves coming from each slit:...
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Can Young's double slit experiment be considered a holographic setup?

As described in his landmark paper on holography, "A new microscopic principle", Denis Gabor sent coherent light through a transparent plate with some black letters on it. The light that was ...
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Confusion about condition of dark fringes in YDSE

I have read that the condition for dark fringes in YDSE is when the path difference is $$y_n = \left(n + \frac{1}{2} \right) \frac{\lambda D}{d}$$ where $D$ is the distance between the double slit ...
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Taming the delayed choice quantum eraser experiment

In the paper Taming the Delayed Choice Quantum Eraser, Figure 2 shows a plot of the bits of Equation 4.7. How do they obtained these plots? For each of them, what is the corresponding function ...
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Double Slit Experiment: What would happen if the slit material was a detector?

In the double slit experiment, if the actual slit material itself was a detector plate, would it collapse the wavefunction?
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Not seeing a diffraction pattern, what could be the cause?

Basically took a piece of paper, cut out a small slit with some scissors, and held my phone's flashlight right on the slit. What could be causing the lack of diffraction? Does the fact that the light ...
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Can Objects in A Product State Jump to a Mixed State without an Intermediate State of Entanglement?

I read that irreversibly going from a pure state to a mixed state requires a two step Von Neumann measurement process: 1) entanglement, via a unitary operator 2) wave function "collapse" (or "...
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Can slits in double slit experiment be substituted?

Can slits in double slit experiment be substituted with something material (rod, sphere, human hair...)? This of course implies lack of walls. It seems reasonable to me, as X-ray crystallography ...
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In double slit experiment, It's the wave function who represent particles, travelling?

I saw some videos who tend to show travelling waves to represent the photon/electron in double slit experiment. Is it right? Because the space between the electron gun and the screen where these ...