Slit Definition and 1000 Threads

It maybe the lateness of the hour, but I've just had another one of those awkward thoughts that only people who know more than I do can provide an answer for (I'm compelled to edit quickly and note that by this I mean that no one I know's going to have a clue, not that I'm somehow an authority...

hi i often heard about the double-slit experiment with electrons and read that it would give the same pattern as the double-slit experiment with photons. so the only difference would be the shorter de-broglie wavelength of electrons compared with the wavelength of ordinary photons. but i...

hi! first of all: I take the opportunity to introduce myself and to say hello to every member of this forum. now. I'm not a pro-physicist: I'm a programmer/3d graphic artist/musician/and everything else curious; so go easy on me :) I was seeing a BBC's documentary about "what is reality"...

Hi - brand new here, so go easy on me! :) I have been considering that the major difference between the observed and the unobserved in relation to the behaviour of light particles appears to be missing something. Every "measurement" device used in the unobserved tests relies on linear...

hi my concern is, that there is a huge amount of equations that are somehow related to the uncertainty principle and it is not straightforwardly obvious to me, when i have to use which of them. let me put it this way: as far as i see, there is this overall applicable equation that says ΔxΔp ≥...

If we send one photon, at a time, through a single slit do we observe the interference pattern? Specially at the edges

Hi, I was trying to learn a bit of quantum mechanics from Feynman lectures. In the 3rd volume of the Feynman lectures, he talks of the double slit experiment with electrons. He says that if we keep a light source near the first slit, so that every time an electron passes it scatters light and...

If we add polarizers to the slits like DrChinese describes above, I believe there is a difference in predicted outcomes between quantum physics and classical physics. A difference I believe can be tested. Both quantum and classical physics predict that the interference pattern will disappear...

Homework Statement Upon using Thomas Young's double slit experiment to obtain measurements, the following data was obtained. Use this data to determine the wavelength of light being used to create the interference pattern. DO this in 3 different ways! The Angle to the Eighth maximum is 1.12...

Homework Statement In a Young’s double-sit experiment performed with electrons, the two slits are separated by a distance of 2.0 x 10^-6m. The first-order bright fringes are located on the observation screen at an angle of 1.6 x 10^-4 degrees. Find the wavelength and momentum of the...

Homework Statement How does adding a lens behind a slit alter the diffraction pattern given you know it's focal length? Homework Equations I know currently that i'd look at equations such as: y_{n} = \frac{nD\lambda}{d} Destructive and so fourth But what about the lens, does that...

we know that if we send one electron through 2 slit, the wave function on the curtain(detector) is a wave that it's maximum is in the center. and we can find electron anywhere on the curtain according to it's probability. but i want to know whether we observe the electron on all part of the...

Hello, I'm not sure if this is the right part of the forum to be posting this in (if it's not, feel free to move me), but I have a question about the double slit experiment. For my AP Physics class, a group of seven other guys and myself are researching the double slit experiment, both...

I am relatively new to QM and so have a couple of basic questions for you all. I understand that the double slit experiment creates an ‘interference pattern’. What bothers me, is that it seems like an assumption to me, that the pattern created could *only* have been made by two waves...

Hi Guys, my textbook mentioned that how the equation for the minima for single slit diffraction was derived: Consider a slit of width W with 2 light rays, one emitting from the edge, one emitting from the center. Their path difference is W/2 sin T . If the path difference is 1/2 lambda, then...

Hi all. So let us say I shine a laser through a slit of width w, the distance to the screen is L, the distance from the center of the pattern formed to the first next bright fringe (next because the center is a bright fringe) is a. Using Fraunhofer diffraction. Given variables: a, w and L...

I have recently learned about the double slit experiments using electrons and photons. This has completely blown my mind and I want to learn more. With this aim I have a question that I hope somebody on here can answer. For this question I want to consider the use of electrons in the double...

So I read that in double slit systems the intensity of the "particle" source does not matter. If it is known that only one particle is in the system at a time, the interference pattern will be the same as observed when there are multiple particles in the system. From this we can conclude that...

Has anyone taken into account the gravity of the slit material causing the electrons to quiver and cause a wave effect in the double slit experiment?

A detector screen far from the slits will show wave patterns whereas a detector near the screen will show particles. My question is what if we maintain the detector screen far from the slits but put some say block of wood near the slits, will we detect wave or paticles?

Why and how do large particles emit single slit interference, also why do electrons not. Also do single atoms display single slit interferance? How is this explained by the copanhagen interpretations as opposed to the bohm interpretation? How does bohm explain single slit collapse with...

This isn't a homework question per se, I'm just wondering about something in my textbook (Halliday & Resnick) that isn't clear to me: This figure shows intensity as a function of angle (0 degrees is the center) for three experiments that use single slits of different width. The one on the...

can the double slit experiment be performed with systems other than light?

Hi hi, first post ^^ Anyway, I encountered this little problem with the derivation of Young's double slit formula. The standard derivation found on the internet and my textbook is shown here: http://schools.matter.org.uk/content/interference/formula.html When deriving, a few errors had...

1. Will wave functions collapse in a photon double-slit experiment after we place a detector at one of its slits and detect one photon? 2. Will wave functions collapse in a photon double-slit experiment after we detect a photon on the screen? 3. Will wave functions collapse in an electron...

I was wondering what occurs when light encounters a slit that happens to be smaller than the wavelength of light that's trying to go through it. Does it just reflect back, does part of it go through thereby making the light have a shorter wavelength that matches the slit, what actually...

Hey guys, I've just got a couple of questions about this prelab I need to do for the Double Slit experiment. And just to make sure this is clear (I have no idea whether the method used in this experiment is normal) we have a double slit and a slit blocker. The slit blocker is after the...

Homework Statement If Young's double-slit experiment were submerged in water, how would the fringe pattern be changed? Homework Equations None...but maybe d\sin(\theta)=m\lambda The Attempt at a Solution It would not because the waves still propagate in the same manner and the...

I'm not a physicist, but have been thinking about these test lately and have hit some roadblocks that should be answerable. 1. Why can't we measure a single photon to determine if it fell into the interference pattern or acted as a particle? I understand this is because I'm thinking of two...

Hi there, I've been told even with detectors behind two slits detecting if a particle comes through, that doesn't exactly mean that the quantum system is now in a mixed-state (for example, the quantum eraser experiment of Scully). How would we be able to differentiate between whether the...

in the double slit experiment , why must the two slits be at the same distance from the first slit?should the interfering waves have the same phase and why?

Hi, I have tried tackling these question but I am simply absolutely lost... 1. A single slit of width 1.50 um is illuminated with light of wavelength 500.0 nm. Find the angular width of the central maximum. I have no attempt for number 1. 2. Microwaves of wavelength 2.8 cm fall on...

Homework Statement A 4-slit interference pattern is created by 4 slits spaced 2μm apart. At what approximate angle θ does the intensity go to zero the first time, if the incoming light has a wavelength of 450 nm? θ1st min = Homework Equations d*sinθ = m\lambda The Attempt at a...

All I know about the Double Slit Experiment is that some particles are shot at a pair of slits, and the particle apparently splits, goes through both slits, and interferes with itself, creating an interference pattern, but if the particles are observed, they collapse and give the results you'd...

Hi, I think that this is (should be) a straight forward question: when conducting the double slit experiment, is there a relationship between the brightness / measure of the light source and the sum of the "peaks" from the interference pattern? (I have done a number of searches but can't find...

My name is Joe Fiero. Ever since I was a little kid, I loved science, especially science fiction. Sliders, Back to the future, Star Trek. I never had a chance to get a degree in the things I loved the most because I came from a poor family... which has lead me to a path of self education and...

hi, Please help me understand this... could you set up the double slit experiment (light, one photon at a time) in such a way that you could measure the time between a photon leaving the gun and arriving at the detector? you could then calculate the path the photon took, so would the...

If one eletron is emitted to two slit after 1 hour from the time when the last electon is emitted, the interference pattern will form on the screen? if one elector is emmited by one day, then same interferece pattern will show? How do you think of it? Is there such a exeriment?

Homework Statement In a double-slit experiment, He-Ne laser light of wavelength 633 nm produced an interference pattern on a screen placed at some distance from the slits. When one of the slits was covered with a thin glass slide of thickness 12.0 um, the central fringe shifted to the point...

A laser emitting light with a wavelength of 560 nm is directed at a single slit, producing an interference pattern on a screen that is 3.0 m away. The central maximum is 5.0 cm wide. determine the width of the slit and the distance between adjacent maxima. attempt i used this equation...

Young's doublt slit experiment - Systematic and random errors - URGENT! Homework Statement Can anybody think of any other systematic and/or random errors for young's double slit experiment when using it calculate the wavelength of a light source? I have an inclass prac write up tomorrow and...

Homework Statement I was a asked a question from an experiment: What happens if the light shone into the diffraction grating or a double slit is not perpendicular to the diffraction grating or double slit? What will happen?The Attempt at a Solution Straight away i can tell that the light...

Homework Statement Hey everyone, I am doing youngs double slit experiment to find the wavelength of a light source but i am having a lot of trouble finding the independent and dependent variables. Can people suggest what they could be? Thanks. Also, some controlled variables would be...

Hey guys, In diffraction of light, why must the slit width be of comparable size to the wavelength of the light being shone on it for diffraction to be noticed most? Thanks

Monochromatic light illuminates a pair of thin parallel slits at normal incidence, producing an interference pattern on a distant screen. The width of each slit is 1/7 the center-to-center distance between the slits. Which interference maxima are missing in the pattern on the screen? every...

Two very narrow slits are spaced 1.8 \mum apart and are placed 35.0 cm from the screen. What is the distance from the first and second dark lines of the interference pattern when the slits are illuminated with coherent light with \lambda =550 nm r1-r2=m\lambda dsin\theta=m\lambda...

While reading Feynman's 6 Easy Pieces, I see he talks about bouncing photons off of the electrons that are passing through two slits. According to Feynman, when a photon strikes an electron near one of the slits, it bounces (sometimes back at the observer) and registered as a sharp point of...

Right so I've been stuck with this for a while now and I'm sure it's just something simple that I've missed. Right so the question says there are a pair of closely spaced slits (0.300mm apart). By changing the spacing the bright fringe moves from position m=2 to m=3. The wavelength remains...

http://en.wikipedia.org/wiki/Quantum_entanglement#cite_note-0" Is there an experiment where bucky balls are entangled? Many of us have heard about bucky balls showing single particle interference in a double slit experiment. However I have not heard of them being entangled. I read the...

Hi, In a double slit experiment, shooting a photon will produce interference pattern on a screen. Using a detector to detect which slit the photon passed through will destroy the interference pattern. The photon will pass through only 1 slit, and cause slit pattern on the screen. The...