Double slit experiment Definition and 484 Threads

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...

double slit experiment, question on when the path is "determined" Hi all, question here from a non-scientist. Let's say I set up a double-slit experiment, with a detector at one or the other slit. I get it working, so that when I am able to determine the particle path, the interference...

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=...

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...

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?

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?

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 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...

I read that quantum particles (like photons) travel as waves of probability, but when they encounter other quantum particles, the probability waves break down, and the photons assume properties of particles. An example given of this is: if you fire a single photon from point A, to a point B...

Lets say that I were to perform the double slit experiment so that at anyone time only a single photon passes through the double slit at a time. Now let's say that I were now to place a polaroid film over each of the slits so that each piece of the film was orthogonal to the other. Now in front...

Can anyone direct me to any version of the double-slit experiment which used only electrons with aligned spin axes? If you can't direct me to an experiment, can you postulate how or if the double-slit experiment might be different using such electrons? Thanks!

As I'm not learning quantum mechanics formally in a classroom, I have no real experience with the matter, or a teacher to whom I can pose my questions. There are a few experiments I'd like to run as well, but no way to do so. In any case, I'm hoping that someone else has run these experiments...

Homework Statement Light from a helium-neon laser (wave length 633 nm) is used to illuminate two narrow slits. The interference pattern is observed on a screen 3.1 m behind the slits. Twelve bright fringes are seen, spanning a distance of 50 mm What is the spacing, in mm, between the slits...

I need to recreate this experiment. It doesn't have to be exactly the same, nor does it have to use very high tech and expensive equipment, it just has to be able to demonstrate interference patterns created by light. I cannot find any specifications on how to build this experiment, and I don't...

I have a problem with the outcome of the Double Slit experiment , in that it was concluded that when under observation the electron particles behaved differently to when not directly under observation - conclusivly stating that it was the ACT of observing that changed the electron behaviour in...

I've been thinking about the double slit experiment - the one with single photons going thru two slits forming an interference pattern never the less. Now, one thing i was unable to find clarification for is the claim that placing a detector even in just one of the slits to find out thru...

We will not get an interference right? Why? Because the electron interacts with the system? Or the "measurement" forces the wave function to collapse? What if we put a black cloth on the chamber and only see the photographic film? What if we place the chamber before the slits. What if we bring...

I'm thinking about using two slits, a webcam and a laser to calculate distances for a project. Usually you measure the distances between maxima but this can be easily measured in a dark room using Matlab and it's image processing routines. I can create the slits and accurately measure them...

Hello, I'm wondering how the two slit experiment interacts with entanglement. Here's an ascii art picture of the standard two slit experiment: | | | | #...

hi, I'm new to this forum and mainly because i have some questions regarding a book i am reading. Brian Greene's The Elegant Universe: Superstrings, Hidden Dimensions, and the Quest for the Ultimate Theory mainly he explains the view that Feynman have on the double slit experiment as...

I propose a setup to distinguish between the quantum interpretation and the wave interpretation of the double slit experiment. Briefly, they are: Quantum The photon gun fires a photon that travels through either slit A or slit B, then hits a detector cell registering a spot in the...

Suppose an observer is moving at some constant velocity(<< c) and observing the young's double slit experiment. What changes will it observe compared to an observer at rest? This is what i could make out : 1) The wavelength of incoming light will change (doppler effect) 2) By the intuition...

Double slit experiment --WHAt is it it showing or proving Im just not getting the general concept of what this experiment proves. Please explain in very simple language --thanks!

Excuse me for patting myself on the back here but I just did my first successful double slit experiment. And it was easy! I poked 2 small holes in aluminum foil just as close as I could and shined my kid’s cheap red laser through them and Viola! I thought I needed razors and prisms and 2 lasers...

Hi guys, I am new to this site and would like to say a little about the double slit experiment. I find the fact that the electrons or photons choose both paths unless being watched absolutely amazing. But what I find even more amazing to me is this: The electrons, when fired at the screen one...

Has anyone heard of anyone trying to conduct the double slit experiment with a barrier between the two slits that goes all the way or near the detector? If it could be done maybe it would be interesting to see the result. It may answer the question if the photon (or electron) is interferring...

Young's double slit experiment produces regular intervals of bright fringes and dark fringes. The bright fringes happen when the 2 sources of wave are in phase and superimpose while the dark fringes are produced when the 2 waves are in antiphase and vectorially cancel each other out. However...

1. The photograph shows the interference pattern produced when monochromatic light falls on a pair of slits. I cannot post links yet but the photo is of a typical fringe pattern produced by coherent light waves from a double slit. Mark with an X on the photograph the fringe or fringes...

hey everybody, I am doing a physics project on the double slit experiment. (I know all the physics and math behind it so don't get into that stuff :P) I was just wondering if people had any suggestions on how to conduct the experiment, I was thinking of cutting two extremely small (knife blade)...

Hi I would really appreciate if someone could answer what maybe a really simple question. I'm no physics expert but I do read a lot and I have a keen interest. My question is related to light interference and the double slit experiment. I know that by observing which slit a photon of...

Homework Statement http://img141.imageshack.us/img141/1395/40941671kx8.jpg http://img141.imageshack.us/img141/982/82443157pt9.jpg Homework Equations http://img85.imageshack.us/img85/4523/60192566ie7.jpg The Attempt at a Solution I'm not sure where to start with this one. I've...

Hi, I have a physics assignment which is asking me what the fringe pattern would look like if white light was passed through a double slit. Would it look like a single light which became gradually darker the further away it got from the central maximum? Thanks in advance Richard.

My apologies - you are all probably bored to death with these kind of naive questions - but I'd appreciate an answer if someone knows a definite answer. I'm thinking about the original double slit experiment - We fire one particle at a time at two slits and, as long as we don't detect which...

I am stuck on a question regarding Young's Double Slit Experiment. The two beams in Young's double slit experiment must (a) be parallel (b) have equal intensity (c) come from the same source (d) traverse equal distancesHere are my reasons for my answers. I may be misinterpreting certain parts...

While researching the double slit experiment and finding that even when only one photon is fired at a time and interference still occurs (so the photon must be traveling through both slits at once) i came up with a possible problem with the theory and wondered if anyone could help me see where...

can u suggest a good site for studying young's double slit experiment involving interference of light coming from two coherent sources online?

A double-slit experiment is set up using a helium-neon laser (lambda =633nm) . Then a very thin piece of glass ( n=1.50 ) is placed over one of the slits. Afterward, the central point on the screen is occupied by what had been the m = 15.0 dark fringe. How thick is the glass? I really need...

Q.Suppose that the the light rays in young's Double Slit experiment fall at an angle \theta=\sin^{-1}(\frac{\lambda}{2d}) .Then prove that the the Point P which is the symmetric point on screen between two slits is the centre of central minimum Necessary Formulaes for minima the waves...

i was going through the standard proof of Young's experiment using electric field concept .what the proof did is took two source S_{1} and S_{2} in the same line(asuuming such points do exist) and took a point P in the same plane as those points and found out the field at the point . 1.Was this...

Double split creates a wave interference pattern. Closing up one slit creates a particle like pattern (all hitting one spot). Does the closing up of one slit (allowing the particle to go through in only one narrow spot) measure its position (by the powers of Heisenburg Uncertainty Principle)...

hi all...it is said that constructive interference happens when the path difference is nlambda and i think wavelength,frequency and amplitude of light going through both slits is the same then why is the central maxima is the brightest spot? why the brightness decreases when n increases...

I have a simple question on double slit experiment, In double slit experiment, after the light rays pass through the slits, place two beam splitters (down converters) which split the light into two rays, one going towards the screen and other going orthogonal to it. Now my question is do we get...

Homework Statement From "http://physicsweb.org/articles/world/15/9/1": In 1909 Geoffrey Ingram (G I) Taylor conducted an experiment in which he showed that even the feeblest light source - equivalent to "a candle burning at a distance slightly exceeding a mile" - could lead to...

Hi I don't know whether this is a homework-type question or not, so I am posting it here. In young's double slit experiment the interference pattern is found to have an intensity ratio between bright and dark fringes as 9. What does this imply: (Below are the options provided in the book...

I was watching a video about Quantum Mechanics and the double slit experiment which shows electrons to be both a wave and a particle, though not at the same time. I had learned this earlier in high school, though at that time did not understand the importance of this. Now I do and would like to...

http://video.google.com/videoplay?docid=-4237751840526284618 Something interesting i found, pretty much introduces Quantum Physics.