Double slit Definition and 825 Threads

Homework Statement Two slits are separated by a distance of 4.40x10-6m and illuminated with two monochromatic light sources with wave lengths of 600nm (red) and 400nm (violet). The mr bright fringe of the red light coincides with the mv bright fringe of the violet light. What are the lowest...

I'm just a layman with an interest in science, so my terminology won't be accurate. Sorry. Set up for question: the wave-front splits as it passes through the slits and must (I guess?) condense to a point upon impact with the recording device (paper/film etc). The question: if a photon is...

Hi Folks, I am not sure I can appreciate the quantum weirdness that supposedly exist because I do not fully understand the experimental set-up of the double slit experiment. I watched the following which left me with some unanswered questions I have some questions about the experimental...

What is the experimental outcome of a single photon or electron double slit experiment under the constraint that after each detection the detector material is reset to the original state ie, in the limit it is substituted by another detector sheet, or photographic plate. Of course that the...

What happen if you do the following version of the double slit experiment: In first sequence the right slit is open and the left is closed, and a number of electrons are sent through. Then the right slit is closed and the left is opened, and a new sequece of electrons are fired. After completing...

I'm at wits end. I hate WileyPlus. Part A, B and C are correct. I cannot figure out what Part D is -- all of the answers I am getting are wrong. Homework Statement Homework EquationsThe Attempt at a Solution

A few question about the double slit experiment... I have watched many videos and discussions about this experiment and am curious if anyone has ever varied the slits... What happens if one slit is vertical and one horizontal? If they are closer together or further apart? One fat and one...

I'm trying to understand the delayed choice quantum eraser experiment without consciousness. As I understand it, photons will either interfere or not depending on whether or not "which-path" information is randomly hidden and rendered unkowable to the experimenter. That is, rather the by any...

I create 1000 pairs of entangled particles and let them travel very far away. Then I let the 1000 right particles pass through a double slit experiment. At the time when the right particle has passed the slit, but not yet hit the screen, I can choose to detect the 1000 left particles. If I...

hey! Whats the difference between the intencity graph of diffracted blue laser light and diffracted red laser light? Thanks

Homework Statement A Helium laser, λ = 588 nm, shines on double-slits separated by 1.80 mm. An interference pattern is observed on a screen at a distance R from the slits. The point C on the screen is at the center of the principal maximum of the interference pattern. The point P is the point...

I know an electron when not interfered with after leaving it's source is not really in any space. It just has a probability of being in various places, it isn't real yet. But how do i visualize how that happens? Let's say over 500 million Planck lengths in a vaccuum. Does the probability move...

i suppose an entangled source one arm is sent to a double slit the other to a polarizer. I read in another thread that the entangled photon does not produce interferences through the slits. What if i put on the other arm a polarizer before the first photon reach the slit? Because of...

"An interaction is required to manifest physical reality because it creates distinctions." my friend referring to the double-slit experiment, is it true? He said that the physical world, in order to exist, we need to interact (with our senses) lol

Homework Statement A quasi-monochromatic beam of light illuminates Young's double-slit setup, generating a fringe pattern having 5.6-mm separation between consecutive dark bands. The distance between the place containing the apertures and the plane of observation is 7 m, and the two slits are...

Hey everyone, I was just wondering how the detectors on the slits operate. The ones which supposedly observe the particle without altering it's trajectory too greatly. I have no idea how this would work with a photon. I'm assuming it's easier with an electron or something.

I know that photons interact weakly with air molecules which is why we have the interference pattern, and I know they interact strongly with say mud so there would be no pattern in a mud pit, though I am not sure if in a mud pit there would be any kind of light that reaches the screen at all...

I'm know I'm just an enthusiastic newbie here, but something's been nagging me and I would appreciate if I could get some assistance on the matter. I got a notion about light and the double slit experiment, the notion came to me as I was contemplating light traveling at its native speed. For...

Can @Drakkith , @Doc Al and others help me in this? In YDSE, if s is the size of source slit and S is the distance between source slit and the double slits, Then why condition s/S <= λ/d must be satisfied to observe fringes? Here λ is wavelength of light source and d is the distance between two...

What is the effect on the interference fringes in Young's Double slit experiment when the source slit is moved closer to the double slit plane? I have seen you people @DrChinese , @Cthugha , @bhobba helping in these kind of topic before. Can you help here? It would be great if others also can help.

Homework Statement antennas can both receive and emit electromagnetic radiation depending on wetter their connecting cicuit is monitored for, or driven by a current. the pattern of emitted radiation is identical to the pattern for absorbed incident radiation. As shown in the notes, far-field...

Why are the orientations of waves arriving at the screen not considered when adding amplitudes? For example a double slit in 2D has two radial lengths of R1 and R2, one from each source Slit 1 and Slit 2, arriving at point P1. (See attached) The provides a probability amplitude of...

1. If the measurement is done anywhere after the slits and before the screen, do I understand correctly that it does not create interference pattern? 2. Should screen be thought of as a kind of measuring device? 3. So electron is what? Floating probability? That sometimes can be localized in...

First of all, I want to apologize ahead for three things: 1) Opening another tread about this experiment, with probably the same title than other 800 threads: I took a little time to read the other threads with similar titles and didn’t found this doubt in none of them, and also didn’t seem...

What happens if we cover 1 slit in the experiment? Will it become a single slit experiment?

this is probably a stupid question but is it not possible to know from which slit the electron or photon came when you time the impact on the detector screen? sometimes the electron can only have come from one slit because it must have gone faster than light otherwise no?

Hello, Theoretically any object can convert into black hole by compressing its mass below some radius( describe by Schwarzschild Radius). Suppose one of this object after becoming black hole have radius which is comparable to atoms and nucleus radius. Now my question is what will happen if we...

A question... Perhaps a dumb question... A simple question... or maybe not... In the experiment, why are the slits needed in the first place? If one shoots electrons, then the edges of the slit must therefore do something with them in order to make them act the way the do: the seem to...

One thing that's been troubling me lately is the idea that a quantum experiment can start with the same initial conditions, but the outcome is probabilistic, not deterministic, and how this fits in with the conservation of momentum. I was thinking about the classic double-slit experiment, in...

Homework Statement A light source shines light of wavelength 490nm onto a pair of slits separated by 0.44m. Calculate the angular location and the location in cm of the second order dark fringes on a screen 1.4m from the slit Homework Equations Xn = (n-1/2)L lambda/d delta x = L lambda/d The...

Homework Statement Homework Equations slit width = a , slit separation = b = d (at photo), tanQ=h/L m.λ=b.sinQ λ.b=sinQ B=π.d.sinQ/λ α=π.a.sinQ/λ Iq=Imx(cosB)^2 x (sinα/α)^2// The Attempt at a Solution My first move was to find intensity but I have no idea about the probability of...

Hi, My question is the following: As well known, the interference pattern disappears when one determines which slit the photon has gone through. This also holds for atoms and molecules. Now I understand how the actual experiment works for eg. an atom: They send excited atoms that can decay in...

Hello, I have a questions regarding the double slit experiments using an electron beam. If I understand correctly, in the back measuring plate you will see little tiny dots of electrons colliding; however, the pattern exhibited will be similar to that of the one seen in a wave-like experiment...

Are electron also wave as are photons. I can image electron as Gaussian pulse to preserve it dual particle-wave nature. Does it preserve own magnetic and electric field values and wave frequency?

Sure - this seams to get asked a lot but I am not entirely getting my head around it. Why does the double slit provide perfectly vertical interference lines? I understand the premise of why this would happen in a 2d world - the usual wave analogy applies. However, in 3d it surprises me that...

It is clear from some more advanced variations on the double slit experiment (quantum erasure, etc) that retaining or destroying "information" on one half of an entangled pair affects the result of the other. The results tend to either be wave or particle type behavior on a detection device. I...

Do I get this correctly: if a wave/particle is not measured, it is in the wave state, and if it is measured, it becomes a particle, fixated on an eigenstate of the probability distribution of the wave function. So the universe - matter, light, each natural phenomenon - if unmeasured, is in a...

Homework Statement [/B] we used a laser pointer as a light source Homework Equations I'm having trouble looking for an error in the experiment. The Attempt at a Solution

Homework Statement Coherent light with wavelength 585 nm passes through two very narrow slits that are 0.320 mm apart. The screen is 0.700 m away from the slits. The intensity is I0 at the centre of the central maximum (theta=0) (a) What is the phase difference (in radians) in the light from...

Hi all, I'd like to ask what was the first time the double- slit experiment have been made by electrons. In Brian Greene's film: It's said to be in nineteenth twentieth, while at other webpages as...

i would be interested in seeing dbl slit experiment done with different patterns. i.e. instead of slits circles or one slit one circle etc. has this been done

I had this problem on my exam and I was pretty sure i knew what to do but it couldn't come up with the right answers. I diagrammed the problem and showed the way i tried to solve it in blue. Can someone tell me where i went wrong? Basically i found the length the of the first maximum off the...

Homework Statement Young's double slit experiment 'd' - Separation between the two slits 'D' - Separation between the double slit and the screen 'S' - Source (Primary) (It is coherent) S1, S2 - Secondary sources Δx - Path difference between the two rays coming out from S1 and S2 Δx° - Path...

Are there any actual experiments that have been made where it has established if the naked eye can kill the interference pattern on the detector screen in the double slit experiment, that is, can the naked eye somehow function as a detector in this experiement? Let me give an example to clarify...

Hello all, I am just being introduced to quantum physics in my introductory physics course at university and I'm not sure I understand a couple of things...any clarification would be greatly appreciated. So, when looking at the double-slit experiment; what can be seen on the viewing screen...

Homework Statement m=maximum h=distance on the screen from the center of the pattern to the mth maximum D=distance from the central bright peak to the slits d=distance between two slits I have m=1 d(mm)=0.25mm D=2000mm h=0.5mm wavelength= 6.25E-5mm Homework Equations So I used...

Hi everyone, So my quantum physics teacher gave this problem to solve as homework: An experiment to watch neutron diffraction was made. The neutron wavelenght measured was 18.45 Angstroms. The double slit was created by putting a thread in the middle of a single slit. The dimensions of the...

For a double slit experiemnt, the bright fringe has intensity of I, when one of the slit is covered, the intensity is 0.25I. In my opinion, the slit now become single slit, so it has area of half of the initial area, but we know that power is the product of intensity x area, by keeping the...

The double slit experiment is not known to violate any Bell inequality, and thus may have a local hidden variables description. Does Bohm-Dirac theory provide a local hidden variables description for the double slit? Are there other local hidden variables descriptions for the double slit? (If...

Why can we not be more precise when shooting stuff through the double slit, so that we know if it goes in the direction of one slit or the other? By the way, is there any significant difference in workings between single and double slit interference?