Double slit Definition and 825 Threads

A stream of photons pass through a double-slit. The photon stream emerging from each slit then passes through a crystal which splits each photon into coherent entangled pairs. One photon from each pair heads towards a detector (D0) that "can be scanned by a step motor along its x-axis for the...

A laser provides a constant stream of photons which pass through a double-slit. The photon stream emerging from each slit then passes through a crystal which splits each photon into coherent entangled pairs. One photon from each pair heads towards a photosensitive screen and the entangled twin...

Hi so I have been struggling on a part of a question that I'm not too sure on how to solve For some reason PF is not allowing me to pose an image of the question on here so I have provided a link to it Question link: And here is what I tried to do so far, I drew a sketch of a diagram to help...

Hello guys i have one problem and i can't find right solution. In some notebooks for destructive interference it says Δx=(2k+1)*λ/2, and it doesn't make sense for me because if i insert k=1 it will be 3λ/2 and it should be λ/2. And also for light diffraction d/2sinθ =λ/2, this one is correct...

I tried using lamba = h/p as follows: (6.626 * 10^-34 J *s) / (8 m.s * 0.6 kg) = 1.38041667*10^−34 and then using the small angle approximation sin(alpha) = lamba/d as follows: (1.38041667*10^−34)/(0.6m) = 2.30069444 * 10^−34 then converting to radians with the following: (2.30069444 *...

I honestly do not have any idea regarding this sum. Any help will be appreciated:)

We're told that single photons passing through a double slit produce an interference pattern, but the act of observing which slit the photon passes through causes the interference pattern to show a simple ballistic pattern instead. But observing which slit the photon passes through necessitates...

My question is does the photon that is absorbed by an atom on the detection screen have exactly the same energy as the photon that left the 'gun' source? Hence, does the wave packet representing a photon lose some of its energy when it impinges on the double slit barrier, so that when the...

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I'm still on part a. I think that i may have the wrong equation for intensity. I'm not sure I'm using the right numbers for the "first minimum". I started with getting the wavelength λ=(ax)/D since the first minimum occurs at m = 0.5 I multiplied the distance to the first minimum by 2 to get...

So the angular position for constructive fringes is d \sin \theta = m \lambda = (2m) \frac{\lambda}{2}, \qquad m=0, \pm 1, \pm 2, \ldots whereas for destructive fringes we have d \sin \theta = m \lambda = (2m+1) \frac{\lambda}{2}, \qquad m=0, \pm 1, \pm 2, \ldots I can see that ##m##...

Assumption: Screen detector is much closer to the slits than in "standard experiment" and the small angle approximation can't be used to determine the interference fringe maxima, but the interference pattern still occurs. Is it possible to measure the time of detection in such setup accurately...

1. Is it possible to perform the following, modified double-slit experiment with single electrons/electron beam: The slits are separated in such a way, that each leads to a separate magnetic trap. The traps have oppositely directed magnetic fields, so that the electrons entering them move in...

So when explaining the results of quantum double slit experiments that have evolved from the classical wave double slit experiment, popular lecturers of quantum mechanics often show an animation of an electron gun or photon source shooting a lot of particles towards a double slit. The effect is...

How did you find PF?: Google Is it true that the devices that quantify which slit do NOT produce wave collapse unless they actually record the light measurements rather than just detect them without recording?

Send a classical particle into a three dimensional potential well. 0 Probability of it tunneling. It's a classical trajectory with wobble from uncertainty. It's not a wave, but gets wobble from the quantum field influencing it. https://farside.ph.utexas.edu/teaching/315/Waveshtml/node95.html...

I cannot see how a photon can be detected and yet remain the same photon. I am thinking that the description "If a detector is place at each slit so that we know which slit the photon passsed through, the interefence patten does not form" is sloppy and in error.

Does the following picture which I think shows the guiding field for electron in the double slit experiment have a corresponding image when the experiment is done with photons? Thanks for any help.

m × lambda for bright = (m - 1/2) × lambda for dark so: 2 × 708 = 2.5 × second lambda Second lambda = 566.4 nm But the answer is 495 nm. Where is my mistake? Thanks

I know that ydse is based on interference of light when it passes through an obstacle having almost same aperture as the wavelength of light. Also they should be coherent to have a constant phase difference at every point. But I don't get why the light beams should be parallel?

Hello all! Having some problems understanding this question. From what I know, bright fringes means that there will be constructive interferences, whereby ##d\sin \theta =m\lambda## In this case, I know the d (separation of silts). However, what should I put in for wavelength? I went through...

What part of double slit mystery remains considering single slit can produce interference pattern as well? Does holography not fully explain those patterns behind any number of slits as a sort of "encoded image" of the slit(s)? Does the word "focus" have any meaning in these kinds of experiments?

What I've seen of the experiment involves sending a stream of particles through the slits. I'm extrapolating when I say that the interference pattern could be caused by electromagnetic fields (in the case of massive particles), especially because the particles are moving and probably spinning as...

Hi, Does the distance between the light source and the slits matter? Does the interference pattern change if you move the light source closer or further from the slits? I read from this link that the collimation of the light changes with distance and that affects the interference pattern...

I have no clue how to answer this question. I would imagine for (a) that half of the probability of total particles goes away with only one slit.

Suppose we have a double slit and we fire a photon through it with no photon detector at either slit. We get a interference pattern. Now we put a photon detector at the left slit. The interference pattern is destroyed, right? In this last setup, the photon can be located at the left slit. So...

Homework Statement: In a double slit experiment let d=5.00 D=30.0λ. Estimate the ratio of the intensity of the third order maximum with that of the zero-order maximum. Homework Equations: interference diffraction i guess the goal is this equation ##I_{(\theta)}=I_0 \times(cos^2\beta)\times...

Electrons passing through a double slit is in a superposition of passing through the left slit and the right slit, thereby producing an interference pattern on the screen. But when a detector is placed to detect which slit the electrons pass through, the interference pattern is destroyed. How...

I read in a book the following assertion. In a double slit experiment photons are passed through the slits and detected at the end plate. Each of the two slits has a quarter wave plate which alters the polarization of the photons that pass through it in a way different than the other QWP. Thus a...

If a double slit experiment utilized photons from Cherenkov radiation under water, Would we expect the same results?

0.8m -> 800mm λ = (0.4mm*1.1mm)/800mm = 0,00055mm is it right? I am past that 3 months ago, forgot how to solve.

I have heard that wavelike interference patterns are observed in the double slit experiment even when electrons are fired one by one. https://physicsworld.com/a/the-double-slit-experiment/ My knowledge on the experimental setup is very basic. The reason I am posting here is out of curiosity...

I created this in java just a while ago.

Using the principle of least action can you figure out which path the photon took, or which slit it went thru given some initial condition. Or is this not possible and why.

im assuming the double slit can also be used in the diffraction grating equation. Would the number of lines per meter aka the d value be 1/2 for example in this case also? If both were in one meter.

Hi, I was wondering what would happen with the interference pattern if I had a medium with higher refractive index than air in front of the slits. Would the interference fringes become narrower?

My first post, and my apologies to any real physicists lurking around. I am a lay person. Senario: * Detectors are turned on, thus interacting with the photons as they pass through the slits; * Recorders are turned off, and no record of which way data exists to be observed. Do we get an...

I prefer to discuss in the double-slit experiment light in place of electrons since it makes the underlying principle more clear. Consider the quantum system consisting of the screen and an external (classical) electromagnetic field. This a very good approximation to many experiments, in...

my understanding is that there has never been a double slit experiment with a detector at the slit, where that detector's state was changed as a result of a particle being at that slit. if true, then if such a schema was possible and tried, then there would be no interference, and the reason...

General question to members, when you look at the results and the interference pattern of the double slit experiment for electrons. Does anyone have information on what the empty space is on the screen. The electrons fixed location on the screen shows gaps always. I watched one persons theory...

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In most textbook/internet explanation of light coherence, it gives two conditions 1) monochromatic light, same frequency. 2) light in phase or constant phase difference. Only with the two conditions can light interference pattern be observed in the double slit experiment. But this cannot be...

The conventional Young double slit experiment displays the interference fringes with the first intensity maxima at the center of the detection screen ('center' means aligned with the center between two slits of equal aperture). These are simply called 'fringes'. However, I'm wondering if and how...

Suppose a linear polarized light wave front is incident on a double slit. What happens if one places a quarter-wave polarizer in front of only one slit in the double slit experiment? Does one obtain the usual inteference fringes? Or the diffraction pattern only? Else?

I've read on page 107 of the pdf http://citeseerx.ist.psu.edu/viewdoc/download;jsessionid=617AE275E5CECF5F0AFD69ACBC52141B?doi=10.1.1.205.6529&rep=rep1&type=pdf that . Thus it seems that there are three different interference patterns. 1: We do not try to detect the electron passing through the...

Is anyone did experiment on wave function collapse in double slit experiment. Could you please share information about that, and also share research paper about that experiment. What kind of observation done here, what kind of equipment used for that?

Homework Statement question (iii) 2. Homework Equations D=sd/λ (where D is the distance from slit to screen, s is the distance to the central maxima, and d is the slit separation)[/B] The Attempt at a Solution I plugged the values s=0.3*10^(-3), d=4.5*10^(-3) and λ=633*10^(-9), and got the...

This question relates to the double slit experiment where measurement affects whether an interference pattern is generated. If an experiment were performed where electrons were sent through a double slit with another double slit behind the first double slit, and the measurement device measured...

Hi. Double slit experiments are being performed successfully with increasingly large molecules. Some physicists (e.g. Anton Zeilinger) believe it might work with viruses as well. Assuming it works with a system that qualifies as a measurement device (be it a virus or something else complex...

Hi. Would it be possible (at least in principle) to use the spacetime perturbance caused by the energy-momentum of a photon (or any other particle) to figure out which way it took in a double slit experiment? Can this question even be answered in today's attempts at quantum gravity?