Slit Definition and 1000 Threads

In my modern physics course we learned that electrons, when shot through two close together slits, will produce an interference pattern just light light. However, when you set up an experiment to observe which slit the electron goes through, there is no longer an interference pattern. To my...

Homework Statement If i have the intensity pattern of a double slit experiment and aim to find the wavelength of the monochromatic light incident on the slits with the following information, - width of each slit - distance to the screen - intensity pattern (displacement Vs intensity)...

What if: 1) we put a swtich gate on the bottom slit. The bottom slit is normally closed, but we time it so we open it just before a photon/electron MAY arrive. so far this will yeild the same result as traditional experiment? 2) usually the two slits are close by, but we move it very...

Homework Statement When a 450-nm light is incident normally on a certain double-slit system, the number of interference maxima within the central diffraction maxima is 5. When 900-nm light is incident on the same slit system, the number of interference maxima within the central diffraction...

Question Suppose molecules are placed next to the slits that fluoresce when electron passes, emitting a photon that can be imaged. Explain why this is no better than direct illumination, and explain how the two-slit interference pattern is destroyed. My Answer In direct illumination, a...

Whilst skulking through Youtube videos for a deeper understanding of quantum mechanics I noticed that vidoes offering accurate, legitimate, remotely-science-based information were few and far between. The rest seemed to be videos of people saying that we, as thinking beings, create the...

Ok so I was sitting out back one day listening to some music with some friends around. We had some music playing on a stereo inside the house and we were out the back with the glass door open about 10 cm's. I thought I noticed that some sounds with different frequencies seemed louder then...

　 Buckyball Double Slit Experiment I've been reading old archives here and even the FAQ and still not definite about the answer. It is said that a buckyball composed of 60 carbon atoms can still form interference pattern at the screen. It is not the complexity of the object but the fact...

Homework Statement (a) In a double-slit system, what value of d/a causes diffraction to eliminate the third bright side fringe? Homework Equations I(\theta) = I_mcos^2(\beta)(\frac{sin(\alpha)}{\alpha})^2 \beta =\frac{\pi d}{\lambda} sin \theta \alpha = \frac{\pi a}{\lambda} sin \theta...

Hello, I was wondering if I could get any help with the following question/thing: Why does a stream of photons (let's say that one is fired every 3 seconds) at a double slit as shown in Young's double slit experiment create an interference pattern although there is no interference because the...

If electrons are strings (in string theory), what happened to the string between emission at the double slit experiment and detection on the screen after it passes thru the 2 slits? Does the string splitted and joined again after the slits? Before string theory, we just say particle...

Homework Statement See figure attached. Homework Equations The Attempt at a Solution \Delta L = asin\theta = m \lambda If the waves are in phase, we would expect L to me a integer number of wavelengths, when they are out of phase, L should be an odd number of wavelengths, but...

The double slit experiment is often described like this: (I'll describe the photon version, but of course the electron one is the same) "We fire individual photons at a screen with two slits. An interference pattern appears. But when we try to look at the slits to figure out which slit the...

Homework Statement This is the light intensity on a viewing screen behind a rectangular opening in a screen. Is the shape of the opening (1), (2), or (3)? Homework Equations w=(2λL)/a where w is the width of the central maximum, L is the distance to the viewing screen, and a is...

A friend of mine pointed out this website to me. http://www.doubleslitexperiment.com/ The site posts an interesting theory; I'll take a quote from the sites document: "For some unknown reason that haunts scientists, everything we perceive as having mass is just a wave of information (or...

Homework Statement See figure attached for problem statement as well as my attempt Homework Equations The Attempt at a Solution I don't know where to go from here. Can someone help me get started?

Homework Statement See figure attached for problem statement as well as my attempt Homework Equations The Attempt at a Solution I don't know where to go from here. Can someone help me get started?

Homework Statement See figure attached for problem statement as well as my attempt. Homework Equations The Attempt at a Solution I don't know where to go from here. Can someone help me get started?

Homework Statement Red plane waves from a ruby laser (694.3nm) in air pass through two parallel slits in an opaque screen. A fringe pattern forms on a distant wall and we see the fourth bright band 1o above the central axis. (Counting the central bright fringe as zero). Calculate the...

Homework Statement I am required to calculate the width of a single slit. I have known distance, L, between the observation screen and the slit, and photo images were taken of the resulting waveform. However, the wavelength is unknown, therefore making many of the equations I'm attempting to...

My question is about the double slit experiment..I was just listening to a guy explain this experiment on youtube and I got skeptical at one point in his explanation. He said that when the photons went through the double slits the detectors were turned" on" then the observers viewed the results...

Homework Statement Calculate the slit separation (d) given that: Wavelength = 650 nm (Plugged in 6.5*10^-7 m) m = 1 (plugged in 1) Distance to screen (D) = 37.5 cm (plugged in 0.375m) Distance between centre to side order (y) = 0.7 cm (pluged in 0.007m) Homework Equations We were only given...

Hi, I'm new here and have been thinking about the double slit experiment (with one photon at a time). As I understand it, you fire one photon, it goes through both slits, interferes with itself and hits a point on the detector according to probabilities that correspond to what you would...

Homework Statement I did the single slit light diffraction lab. The diode laser we used was 630-680 nm. It produced an image very much like the one on this page: http://hyperphysics.phy-astr.gsu.edu/hbase/phyopt/fraungeo.html#c1 How does having multiple wavelengths in the laser change...

A text I am reading noted that as a multichromatic light source (consisting of many individual peaks) is passed through the my slit (order .25mm) the peaks will be spread over the neighboring wavelengths in a roughly Gaussian distribution. I am trying to understand why this is, and how I would...

A text I am reading noted that as a multichromatic light source (consisting of many individual peaks) is passed through the my slit (order .25mm) the peaks will be spread over the neighboring wavelengths in a roughly Gaussian distribution. I am trying to understand why this is, and how I would...

Hi all, Is it possible to do the Young's double slit experiment at home? A related question: Can I generate a focussed electron beam from house hold items? Thanks Ravi

Let us say we have source that can emit a single photon. We can in principle detect when the photon leaves the source due to the momentum kick. Now let us say this single photon passes through both slits and forms a dot on the far right of the screen. Now if we draw paths through the two slits...

I'm pretty much a newbie to this quantum physics stuff, but the one thing that really blows my mind is the double slit experiment. I just don't make much sense. Anyways, I was wondering, could the interference pattern caused by firing a single particle through the double slits be the case of...

I have a question about the double split experiment, don't know if it's been asked before... Specifically, I have read and watched in some videos explaining that, when shooting electrons, physicists decided to shoot 'one electron at a time', to make sure they are not interfering with each...

Have there been any experiments done where a particle was detected to go through one or the other slits when after the detector was destroyed before the data could be known by a human? Does the detector's detection alone determine a particle rather than a wave behavior?

Homework Statement A single slit is illuminated with a helium-neon laser whose wavelength is 633 nm. If the slit width is 2.2 x 10 e-5 m, calculate the position of the third maximum in degrees Homework Equations Sin Theta(m) = (m + 0.5) Lambda/w The Attempt at a Solution...

Consider a double slit experiment at the event horizon of a black hole, with 1 slit on each side of the horizon, one observer inside and 1 outside, inside observer should observe interference by equivalence principle, whereas outside one should not, since the photons can't enter the second slit...

Since my ability to respond to articles was messed up by someone and I have been unable to get any help straightening out the problem I wish to comment on the article here. I have always thought it more than a bit unusual that anyone would consider it "strange" that EM radiation, particles...

I was wondering why laser on a hair makes the hair act like a single slit. I already know about Huygen's Principle behind it and all that. But what is it that can convince you that it actually is a SINGLE slit and not a double, other than just seeing it by measuring min. and using mλ = d * sinα...

Homework Statement Electrons pass through a 10-6m wide slit with a speed of 1.5 x 106m/s. How wide is the electron diffraction pattern on a detector 1 m behind the slit. Homework Equations \lambda=h/mv (matter waves) asin\theta=m\lambda (path length difference for constructive...

In the double slit experiment - what exactly is the measuring device? .. the have to measure witch slit the photon went trough - how do they do it? - measuring anything means interacting with it. Changing it, really. So, isn't it obvious that interacting with the photon in any way will...

Hello all, I have some questions in regards to the double slit experiment. Now I apologise if some of these seem very basic, likewise if they are very hard to explain, however it is something I would like to get a better grasp on. First, you are firing out of said ‘gun’; let’s say a...

When electrons are passed through a double slit and can either display a wave-like interference pattern or a particle-like build-up pattern, is that because their momentum/direction is changed by the measuring device interacting with them, or due to some other feature associated with being...

I am familiar with the dual slit experiment up to the point where measuring at one slit made the interference pattern collapse. My question is has anyone tried using a sensor of some kind that has no memory or output? Does the observer have to be sentient? I have a feeling someone has...

When light goes through a narrow single slit it diffracts. And you can explain this with the uncertainty principle or the wave-like nature of light. But if a photon can only be in one medium at a time then how does it know its going through a slit , How is it interacting with the edges of the...

I've thought about the case when the wavelength of the incident EM waves on a single slit is much greater than the width of the slit. When we have \lambda >> D. It could be the case of a radiowave incidating over a single slit whose width is day a nanometer large. According to Hecht, the...

Consider one slit white light diffraction which produces rainbow fringe - black fringe - white fringe-black fringe-rainbow fringe. That is, continuous spectrum (or...two continuous spectrums). My question is, instead of white light, project monochromatic red light. What happens then leaving all...

Homework Statement Light of wavelength 680 nm falls on two slits and produces an interference pattern in which thefourth-order fringe is 38 mm from the central fringe on a screen 2.0 m away. What is the separationof the two slits? Homework Equations Sintheta=2m(\lambda2d)...

I know this may be a completely stupid question and it's so fundamental but... As we all know the first thing we learn is basically the duality between waves and particles (e.g electron). This is shown via the double slit experiment. Now I know how to explain it if it were water waves, and...

Has anyone done the double slit experiment on light after being refracted into its separate colors of the spectrum? (Hope I asked this right, because I'm curious if each individual color still behaves the same way as when unrefracted light is passed through the two slits) I guess what I'm...

Homework Statement Suppose electrons are sent through a double slit set up with a the slit width = 5.00nm and d the slit separation = 10.0nm. If the maximum current at the screen is 2.30μA, what is the current at the point .500 cm above the central maximum? Homework Equations dsinθ=mλ...

When waves diffract through one slit why does it form a series of maxima and minima when there is no interference?...our teacher won't tell us and its really annoying me...and i have no idea why it should. please help! ~sorry if this is in he wrong place

1. Homework Statement [/b] given the following probability distribution function from 5 slits (y is verticle on screen) P(y) = A | \sum(from n=-2 to 2) exp(ikR(n)) |^2 where k = 2\pi/\lambda and R(n) ~ \approx R-nyD/L Show that the probability distribution as a function of angle...