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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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Why aren't particles constantly “measured” by the whole universe?

Let's say we are doing the double slit experiment with electrons. We get an interference pattern, and if we put detectors at slits, then we get two piles pattern because we measure electrons' ...
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About YDS experiment and their one case

When we put the complete YDS in a medium having refractive index u what happen when we introduce a glass slab then what will happen in shifting of Central bright?
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Holograms and Entanglement: Does recording an entangled signal in a hologram “observe” the entangled state?

Suppose I have two photons $A$ and $B$, which are entangled. As I have had it explained to me, entanglement works more or less as follows: I observe or measure $A$, and find $A=S_a$, where $S_a$ ...
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Double slit diffraction derivation

The task is to derive the intensity pattern of a double slit diffraction, where light travels along the $z$-axis, the point of interest lies on the $x$-$z$ plane, the slits are wide (in $z$-direction) ...
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Double-Slit Experiment with Dissimilar Photons

When scientists fire a string of single particles rather than a random scattering of them, the effect of non-interference/interference remains. Now, let's suppose that we have a particle source that ...
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Delayed Choice Quantum Eraser - what is erased?

I fail to see why everybody thinks that something is erased in the famous Delayed Choice Quantum Eraser experiment (see https://arxiv.org/pdf/quant-ph/9903047.pdf and https://en.wikipedia.org/wiki/...
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Notation question about double slit interference pattern

I know that the conditions for constructive/destructive interference are given by the following equations: $$\text{Constructive:} \space \space \space d\sin{\theta}=n\lambda \\ \text{Destructive: }\...
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In Young's double slit experiment, can you get the deaf spots larger than the loud spots?

I'm trying to get the strong spots, to be very little larger, same size, or smaller, than the weak spots. Is it possible?
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Another Quantum Eraser Question

What is mysterious about the so called quantum eraser? A typical double slit experiment produces an interference pattern on the screen. In a double slit quantum eraser experiment there are ...
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double-slit experiment showing faster than light information transfer?

In the figure shown below, a laser sends a continuous stream of a large (almost infinite) number of photons per second at a double slit, and the photons are then are displayed on a screen. The upper ...
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can entangled photons produce an interference pattern?

Suppose you have a laser that emits entangled photons in opposite directions towards a double-slit screen setup as shown below. The photons are entangled such that if a photon on the left travels ...
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Why are my interference patterns completely out of phase?

DIY physics enthusiast here doing a double slit eraser experiment at home with a laser pointer, double slit diaphragm, and few linear polarizers (horizontal at one slit, vertical at the other, +/-45 ...
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Double silt experiment with one circular polarizer in front of only one slit in the which-way perspective?

If one puts in front of a double slit two quarter-wave circular polarizers (QWP) in front of each slit, say one with 45° and the other with -45° orientation (fast and slow axis - i.e. clock- and anti-...
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Double slit experiment: why does the barrier between the slits not collapse the wave function?

During the double slit experiment the electron passes through both slits, how come the material between the two slits does not collapse the wave function and we get an interference pattern? On the ...
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What happens if separation between slits is greater than separation between slits and screen in YDSE experiment?

I was studying Young's double slit experiment (YDSE) in which it was derived that the formula for path difference ($\delta x$) is : $$\delta x = \frac{y \cdot d}{D}$$ Where $y$ is the vertical ...
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Interference pattern and slit

Three questions about interference pattern and slit. (i) In the 1-slit experiment, an interference pattern is observed if the slit is wide enough (a narrow slit gives a rather blurred interference ...
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Double slit experiment record but not look at it

I am having a tough tough stressful week trying to write an article about quantum mechanics. I know there was a question asked the same thing before, but I didn't understand nor I did not want to wake ...
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Double slit experiment with only ONE detector [closed]

Suppose one sets up a double-slit experiment, but with only ONE detector behind one of the slits (the left one, let's say). Now suppose the dots that appear on the screen are ERASED (by the ...
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Why can‘t the Double Slits Experiment be explained by a Particle?

I simply don‘t understand why the assumption that light moves as a Wave makes more sense than that it moves as a Particle... (I know that the assumtion is more about light „sometimes“ being a Wave, ...
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Does simply putting a photon-splitting crystal after a double slit break the interference pattern?

A modified version of the quantum eraser experiment, consisting of just a photon source, double slit, photon-splitter crystal and a screen, capturing one of the entangled twins. No detectors, no ...
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Double slit experiment and Dirac Sea of electrons

Imagine a sea of electrons which is so tightly packed that exclusion principle comes into play, next I remove 1 electron from this sea... this hole should behave like a particle and is positively ...
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Modified double slit experiment

Imagine instead of an opaqe screen with 2 slits, we have a mirror with 2 slits. Would this produce an interference pattern both on the screens behind and in front of the mirror? We still don't know ...
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Would the fringe spacing be the same if the slits were at different positions in Youngs double slit experiment?

If the experiment was set up as shown in the image below, where the two slits are at different distances from the screen, would the fringe spacing still be y = ($\lambda)*L/d$ where $\lambda$ is the ...
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How are Young's double slit experiment and speckle patterns related?

I know that when light from a laser is reflected from a rough surface onto a screen, it produces a speckle pattern. I believe, a Fourier transform of the intensity distribution of the speckle pattern ...
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Double slit experiment/ fitting data to complicated sine function and vice versa [closed]

As part of analysing the double slit experiment, I've recorded position values for a number of minima and the central peak position. Also, I've conducted a single slit experiment (with unknown width)...
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Background illumination and noise/Double slit experiment

I have obtained a value for the background illumination with an associated error which was kept constant during a double slit experiment. Also, I have acquired a value for the average noise/...
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Using entanglement for communication based on the double slit experiment [duplicate]

When we perform a double slit experiment we receive interference pattern. when we measure in a specific slit the exact location of the photon (or electron) the interference pattern disappears and we ...
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What’s a measurement qualifier in the double-slit experiment

In the double-slit experiment why does the light hitting the back screen not result in a measurement? How far away from the slit can the measurement take place and still cause a wave collapse and is ...
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Does (Tomas) Bohr's modified double slit argument really doom Couder's quantum/classical fluid dynamics analogy?

I'm just an amateur, probably why I find the de Broglie/Bohm/Couder approach to QM compelling. But Copenhagen struck back: in a coincidence, Bohr's grandson is a fluid physicist who claims that ...
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Altering Young's double slit experiment due to observation

The interference pattern on the screen is altered due to our observation, but how could this happen, as we have been watching it since we started the experiment? Is there any other meaning of '...
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Quantum Double slit experiment with 2 detectors

In a double slit experiment with electrons i have read that if you put a detector at one of the slits, the interference pattern disppears. What if i put on both the slits? I would think it will still ...
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In the Quantum eraser experiment, Why doesn't detector D1 or D2 cause wave function collapse?

I thought measurement at detectors is what collapes the wave function. So why aren't these detectors causing collapse? Why is there an interference pattern?
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Intensity of fringes in a Double Slit experiment

I have learnt that the intensity of fringes in a double slit experiment depends on the following formula: $$I = 4i\cos^2(\delta/2)$$ But it turn out that the intensity of th consecutive fringe ...
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Does interference pattern depends upon the material used to make slits?

Is the interference pattern independent of the material from which the slits are made or is it dependent upon the type of material in some way?
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Young Double Slit Experiment Formula - Nodal Lines

Some sources use the formula $\frac{X_n}{L}= (\frac{(n-\frac{1}{2})λ}{d})$, while other sources use $\frac{X_n}{L}= (\frac{(n+\frac{1}{2})λ}{d})$ when talking about destructive interference. Why is ...
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Casimir effect in the double slit experiment

Has anyone to your knowledge, ever detected, or perhaps just tried to detect, a Casimir effect between the plate (with the slits) and the screen behind in the double slit experiment?
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Double Slit Experiment with Slits at Different Distances from Light Source

In all descriptions of the double slit experiment I have seen the slits were mirror-symmetric to a hypothetical plane that is orthogonal to the slits and contains the light-source. Question: have ...
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The function of the pinhole in the double slit experiment

Even with incoherent light from the sun and not having any laser, Young achieves a result by reducing the incident light to a point-like source. This makes sense because a wider beam works like many ...
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interpretation of double slit experiment

If you do the double slit experiment with a laser beam, you get an interference pattern; as light goes through different paths and the phase shift leads to constructive and destructive interferences. ...
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Double slit experiment- light intensity

The standard explanation for the interference pattern is one of constructive and destructive interference between the light waves from the two slits. But, am I right in thinking that light intensity ...
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In Young's double slit experiment, can there be an even number of maxima in the central envelope maximum?

In Young's double slit experiment, can we get an even number of maxima in the central envelope maximum? If so how and why the regular modelling of the double split interfaces is with an odd number ...
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In the double-slit experiment of electrons (observed by photons), is it correct to say the collapse is caused by the momentum of the photons?

I'm working off the article, The Double Slit Experiment Demystified. Disproving the Quantum Consciousness connection. I think it's well-written, but I'm not convinced about this part: So what is ...
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YDSE - coherence of light from slits and width of slits

In Young's double slit experiment, 2 slits act as coherent sources. Why is coherence lost when the width of the slits is greater than half of the fringe width, i.e, if slit width is greater than the ...
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In the double-slit experiment, why is it never shown that particles may hit the space between or outside the slits?

In depictions of the double-slit experiment that model the photon or electron as a particle, i.e. when attempting to measure which slit the particle passes through, it always shows the particle ...
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What does a basis rotation correspond to physically for linear position-momemtum?

For polarization and angular momentum, rotating the basis corresponds to a very straightforward physical transformation, namely, the physical rotation of an experimental apparatus about an axis in ...
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Many World's Hypothesis [closed]

According to the Many Worlds interpretation of quantum mechanics by Hugh Everett, taking the double slit experiment as an example, every possible outcome that can happen does happen. And the chances ...
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Time variable in a quantum eraser

Hello, On the image above you'll find the display for the double slit "delayed choice quantum eraser" by Scully. I use this experiment for my question as it cames through trying to understand it. ...
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How to transform the irradiance image on the screen in the double-slit experiment back to electric field in order to perform Fourier Transform?

Say I perform the double slit experiment while meeting the requirements of the far-field. I get some interference image on the screen (where R is great, as mentioned). This image is correlated with ...
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Question about the shift of patterns in the Delayed Choice Quantum Eraser

In the double-slit Delayed Choice Quantum Eraser experiment by Scully with the installation in the figure below, as in Wikipedia, when a photon hits D4 or D3 the intricated photon hits D0 with a ...
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How acts a Double slit with a clock?

We have the simple arrangement of the double slit, but with the addition of a precise clock. The screen is also substituted by a CCD camera, so one can check when there is an event (hitting of the ...