Double slit Definition and 802 Threads

Mechanically speaking, where is the photon emitter aimed when there are 2 slits? If the experimenter was using an accurate emitter, wouldn't he/she expect the photons to hit only where it was aimed, e.g. either one slit or neither slit? Is it that the emitter oscillates, so it can aim at each of...

I have been trying to understand the result of the double slit electron experiment I’m still not clear abt the result of the experiment. I have seen the Dr. Quantumm - double slit experiment video(). Its very simple explained. it says when an measuring device is placed to look through...

Find the slit separation of a double slit arrangement that will produce interference fringes 11.5 mrad apart on a distant screen with light of wavelength 471.0 nm. tan(theta) = y/D asin(theta) = p * wavelength I know that I'm trying to solve for a, and that asin(theta) = 11.5, but I feel like...

It was a good while ago since I heard about this particular experiment, but I remember vaguely reading about how in one instance they recorded the observations, but then deleted the data before anyone could look at it, and in that instance the wave was still produced. Thus showing that it really...

Can we do double slit experiment using ,let's say phonons.

hi maybe I'm asking a stupid question, I'm a layman, and i didn't succeed to google out the answer. while performing single photon double slit experiment, why the photons don't just get absorbed in the separation between the slits, like they do in the screen behind. and consequently...

Homework Statement A grating with 349 lines/mm is illuminated with light of wavelength 412 nm What is the angular separation between the two lines formed in order m=2? Homework Equations \vartheta = m\lambda/d The Attempt at a Solution I did not know how to use this equation...

Delayed choice in half silvered mirror or double slit For now, I am focussing only on the half silvered mirror: there are two paths/arms that are created. My question is: 1. If a detector/obstruction is placed on either of the two paths after the photon has passed but before its hit...

Homework Statement 1. What will happen if we use white light as the source of young's double slit experiment? 2. If the experiment is done in water, what will the effect to the yn? yn is the distance of nth fringe from center fringe. Homework Equations d sin θ = nλ d y/D = nλ The...

i have posted a video on youtube,where i did the double slit experiment,firstly with a shallow slit,then with a slit approx 35 times thicker,then did the experiment without lens on laser,i would like to have a chat about what it all shows,and what it says to you (any one)

When a photon encounters a beam splitter, say a half-silvered mirror, there is a 50-50 chance it will be reflected or passed (tunneling). Does being reflected/passed constitute a QM "measurement"? Thanks in advance.

I'm reading the double slit experiment (Cohen-Tannoudji chapter 1 - complement D) and it is said: "We are going to consider Young's double slit experiment again to demonstrate how complementary and uncertainty relations are intimately related. Assume that the plate P, in which the slits are...

Hi all, I'm not trained in physics beyond high school but have a healthy interest and understand a little quantum physics and special (still grappling with general!) relativity. Here's a quick question on a pop.science book I'm reading at the moment. The book is by Marcus Chown, it's called...

Homework Statement A parallel beam of mono-chromatic light (500nm) is incident on 2 long narrow slits: slit width is 0.1mm and the distance between slit centres is 0.3mm. a) How many bright fringes cover the central diffraction maximum? Homework Equations Condition for constructive...

Does the distance from the photon/electron gun to the slit matter at all? Or even the distance from the slit to the photographic plate?

Homework Statement Light of two wavelenghts L1 and L2 (L1,L2 = lambda)creates interference fringes in the Young's double slit experiment. To calculate the least distance from the central maximum where the bright fringes for both L1 and L2 coincide. Given: the distance 'd' between the two...

Lets say some aliens scaled up the two slit experiment to an enormous size. It is so large that shooting 100kg masses of carbon through the slits creates a diffraction pattern. The aliens then decide to replace the carbon with some captive humans and shoot them through the slits to see what...

I was wondering where could I get a slit for the Double Slit Exeriment that I am trying to do.Thanks

Can someone summarise what is the currently accepted interpretation of how measurement affects the interference pattern in a double slit experiment? (Answers which say things like 'the electron knows if it is being observed' are not acceptable - :-) ) To quote from the PF rules, I'm looking for...

I was browsing about the double slit experiment and found the following tidbit on Wiki: (emphasis mine) I knew that electrons could interfere with themselves - I understand how an electron can act like a wave. Even an atom I can understand. But a molecule? This isn't merely suggesting...

When measuring the fringe width of a superposition pattern from a monochromatic source - I am using a laser. What problems/inaccuracies could I have when measuring it?

Homework Statement For light from a discharge lamp, the first-order bright fringe is observed at a perpendicular distance of 2.35cm from the mid-point of the slits, when the slit-to-screen distance is 1.2m and the slit separation is 0.03mm. What is the wavelengh of the light from the lamp...

I could not find any explanation or illustration where it is shown where do they actually aim electron gun (or something) in the version of the experiment where they shoot electrons one-by-one. I suppose this is how original setup looks like: ====================screen== \ / \ /...

Homework Statement A radar tower sends out a signal of wavelength lambda. It is x meters tall, and it stands on the edge of the ocean. A weather balloon is released from a boat that is a distance d out to sea. The balloon floats up to an altitude h. In this problem, assume that the boat and...

Hi everyone, I have a question concerning the double slit experiment that I would like clarified. According to a book I am reading if the electrons passing through slit A are of spin up and the electrons passing through B are of spin down then there will be no interference pattern (just the...

Has this type of experiment ever been performed? Firing electrons one at a time we can easily get the which-path information and see if interference dissapears or not. What actually happens? Also, if we do the double slit experiment with a usual laser but in a smoked environment (in order to...

Hi, I have a question about the famous double slit experiment. They say that if an observer like a camera or a person is watching the experiment then it collapses the wave function and two marks appear instead of an interference pattern. Does anyone know what what happen if a totally...

I have a question about Young's Light-double slit experiment, is there a minimum ratio between the intensity of the light and the size of the slit or the distance in between the slits to alter the results? For example, if a wall has two open doors into the same empty, standard room and a photon...

I have to recreate Thomas Young's Double slit experiment and take pictures of the interference patters for a research paper. My teacher has a powerful red laser at school that I can use, though i know that the interference pattern changes with the changing frequencies. I was wondering if a 5 mw...

I've been wondering about the implications of this experiment and have a couple of questions about variations that I'm wondering if anyone has done. (I did not find any examples of these variations elsewhere). 1) In this variation, you have the photon pass through the slits twice. First...

Hi all I have a doubt on this The experiment per se does not say anything wrt to the size of the slit right? Now my question here is, if i actually reduce the size of the slit to such a size that only one atom of a particular gas(say helium) can pass through this Now let us say i...

please can you lookm at my video on youtube and give comment,if you think I am mad say so,if you think it looks right please say so (it isn't a spam video just what i think is missing from the experiment that's all) http://www.youtube.com/watch?v=hG_vNk-TJOs&feature=channel_page

Hi, I'm encountering problems in my tests about young's double slit experiment and in many of those I'm finding the source executing simple harmonic motion (whose equation is given ) and we are asked to calculate the equation of motion of central bright fringe,max no. of fringes that can be...

Homework Statement A double-slit experiment is performed with light of wavelength 558.0 nm. The bright interference fringes are spaced 1.84 mm apart on the viewing screen. What will the fringe spacing be if the light is changed to a wavelength of 335.0 nm? Homework Equations d=...

Homework Statement Two slits are 0.158mm apart. A mixture of red light (wavelength = 665nm) and yellow-green light (wavelength = 565nm) fall onto the slits. A screen is located 2.2m away. Find the distance between the third-order red fringe and the third-order yellow-green fringe...

There is something I never understood in the double slit. Here is a picture. http://www.physics.colostate.edu/users/pavol/anims/physics/double_slit.gif When the particle is emitted from a source, if it truly acts like a wave, then wouldn't it sometimes hit the wall in-between the slits...

I was reading about the classic Young's double slit experiment and I had a few questions regarding secondary wavelets a.k.a Huygen's wavelets. I proceed with the following questions assuming you know the experiment. The crucial point behind the explanation to the experiment is that light...

In the double slit experiment, Bohmian Mechanics http://plato.stanford.edu/entries/qm-bohm/#2s" the paths of real particles traveling from the two slits to the detector to look like something like this: The above image shows particles traveling in non-straight paths. The diagram below...

Homework Statement A blue laser beam of wavelength 470nm (in air) is incident on two narrow slits separated by .2mm and produces an interference pattern on a screen located 2m away from the two slits. Find the angular position (in degrees) of the 1st dark fringe. Can you use the small angle...

Homework Statement When they say the first and third bright fringe, do they mean m=1 and m=0..do we count m=0? And likewise for when they say first and third dark fringe, is it m=1.5 and m=3.5? How would we know when to count m=0? Thanks Homework Equations The Attempt at a Solution

Homework Statement Could anyone help me to explain how the intensity of the double Slit pattern works because I'm looking at the formula and I'm really confused...Homework Equations I=4Icos^2(phi/2) A=2Ecos(phi/2)The Attempt at a Solution

I've been wondering for a long time whether or not the theory that one electron can be in two places at the same time holds near the singularity of a black hole?

Homework Statement In a double-slit interference experiment, the wavelength is 579 nm, the slit separation is 0.12 mm, and the screen is 30.0 cm away from the slits. What is the linear distance between adjacent maxima on the screen? [Hint: Assume the small angle approximation is justified and...

what the advantage of decreasing the distance between slits in a Young double slit experiment? i think to have the laser move closer to the screen

Hi, In young experiment, say one slit is completely closed, what observed is looks like a single band light. But why is not a diffraction pattern? I wonder whether the reason is, the slit width(don't mean distance between slits) more narrow than single slit diffraction in Young experiment?

Homework Statement Hey guys, I'm working on a problem with a double slit electron diffraction experiment. There is a beam of electrons shooting through two slits onto a screen. When only slit 1 is open, the number of electrons hitting the screen is 25 times the number of electrons hitting...

[Solved] Optics - Double Slit Irradiance of Fringes Homework Statement A double slit diffraction pattern is formed using mercury green light at 546.1nm. Each slit has a width of 0.100mm (= b), slit separation is 0.400mm (=a). The pattern reveals that the fourth-order interference maxima are...

i've always been curious...WHY did somebody come up with the experiment? why did they think anything special would happen? hope this doesn't sound stupid :)

Homework Statement A mask with 2 slits is illuminated by a light of 589nm wavelength. Slits each have a 0.1mm width separated (centre to centre) by 3.0mm. Calculate the distance between adjacent bright fringes on the screen if a screen is placed 5.0m away from the slits. Homework...

Homework Statement In a Young's double slit experiment, a pair of slits is encased in a rectangular block of glass (n=1.52), and glass block is surrounded by air, as shown below. The glass block is illuminated by coherent light (k = 660 nm) from a laser, as shown. The beam enters the block at...