What is Slit: Definition and 1000 Discussions

A slit lamp is an instrument consisting of a high-intensity light source that can be focused to shine a thin sheet of light into the eye. It is used in conjunction with a biomicroscope. The lamp facilitates an examination of the anterior segment and posterior segment of the human eye, which includes the eyelid, sclera, conjunctiva, iris, natural crystalline lens, and cornea. The binocular slit-lamp examination provides a stereoscopic magnified view of the eye structures in detail, enabling anatomical diagnoses to be made for a variety of eye conditions. A second, hand-held lens is used to examine the retina.

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  1. A

    Single slit diffraction confusion

    I've found this a very confusing thing:when we locate the second dark fringes above and below the central maxima,we divide the slit into four parts and claim that pairs of waves interfere destructively as the path difference would be wavelength/2.But what if we just divided it into two parts and...
  2. P

    Find the Width of the Slit Given the Energy of the Electron Beam

    Homework Statement (image is clickable)The figure below shows the distribution of impacts on a screen (see image above) when a beam of electrons of energy ##2.5 \cdot 10^{-3}##eV passes through a single slit. The width of the slit is? Homework Equations ##a\sin\theta=m\lambda \\...
  3. D

    Question regarding the double slit experiment

    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...
  4. B

    Double Slit Experiment: one at a time

    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...
  5. U

    Single photon double slit, reset detector after each impact

    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...
  6. lulzury

    Small Angle Approximation in Single Slit Interference

    Homework Statement A monochromatic light source is used with a double slit to create an interference pattern on a screen that is 2.00 meters away. If the 2nd bright spot is observed 8.73 mm above the central maximum, can the small angle approximation be used? Show and/or explain your reasoning...
  7. M

    Understanding the Light Pattern of a Laser Through a Slit

    Why is it that when you shine a laser through a slit, it has the pattern that it does!
  8. S

    Double slit over time, single slit in moment

    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...
  9. J

    Single Slit Experiment: Details & Equations

    Hello! I am looking for resources to give me details of the single slit experiment. I want to code a simulation of the experiment, but most information i find is too simple or missing details. I need equations for the two angles of the particle (angle with respect to x direction and angle with...
  10. Buckethead

    Dual Slit: how are single electrons/photons detected?

    Can anyone describe in detail the exact device used when detecting single photon/electron presence through a slit in a dual slit experiment. For an electron I suspect a coil is used to detect the electron passing through without destroying it, but for a photon, it's not possible to detect a...
  11. S

    Diffraction effects in slit experiments

    In double slit experiment with a single source,I am finding the traces of one slit when I have the other one open. I think this is due to diffraction effects.May I know how to tackle this?
  12. Z

    Double Slit Diffraction:Finding Greatest Angle for Minimum

    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
  13. D

    Can a Diffraction Pattern be Solved Without Complete Information?

    Homework Statement A single slit illuminated by light of wavelength λ = 610 nm produces a diffraction pattern with its first minimum at 3.5 mm from the central maximum. (a) Find the slit width, and (b) For the same slit, what wavelength of light would produce a first minimum at θ = 4.0...
  14. P

    Explore the Double Slit Experiment: Variations & Results

    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...
  15. T

    Double Slit--closing a slit while particle is in flight

    I'd like to understand the wave particle duality and how information traverses space further within the double slit experiment. Let's assume we have two slits, A and B. A is higher up then B, and an electron moves to the right through the slits and hits a final screen. While the electron is...
  16. W

    Entangled particle through double slit

    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...
  17. CAH

    Red/Blue laser intencity Youngs double slit experiment?

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

    Double Slit Interferance Intensity

    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...
  19. J

    How do i visualize probability in double slit

    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...
  20. A

    Nodal lines and single slit experiment

    Homework Statement The diagram above shows a single slit with lines marking the direction to a point P in the diffraction pattern. Two wavelets at x and y pass through the edges of the slit as shown. The possible value for path difference, py-px, that places P at the second nodal line next to...
  21. jk22

    Question about double slit and entanglement

    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...
  22. Rajkovic

    Double slit experiment and Interaction

    "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
  23. julianwitkowski

    Single Slit / Wavelength / Central Maximum

    Homework Statement 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. I have two ideas of the answer but I'm not sure which is...
  24. W

    Quasi-Monochromatic Light and Young's Double Slit Experiment

    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...
  25. N

    Photodetectors at the slits in Double Slit Experiment

    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.
  26. B

    If the double slit were performed underwater?

    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...
  27. T

    Brainstorming the double slit experiment

    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...
  28. R

    Young Double slit experiment condition

    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...
  29. R

    Effect of source slit in Young's Double Slit Experiment

    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.
  30. L

    Young's double slit and radio antennas

    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...
  31. N

    Double Slit Probability Amplitude Orientation

    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...
  32. T

    Doubble slit experiment getting bigger

    If we increase the mass of the particle beeing fired at the slots, at what point will the standard experiment break down and become just small pellets beeing fired and classical physics will apply? Theoretically say we increase one Planck unit at A time. Or, just is there A limit to the...
  33. R

    Double Slit Questions: Exploring Wave-Particle Duality

    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...
  34. T

    Electrons and the Double Slit experiment questions

    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...
  35. T

    Covering 1 slit in Young's double slit experiment

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

    Double Slit Question: Can We Know From Which Slit?

    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?
  37. Arthurz11

    When does the photon splits in 2 on the Two Slit Experiment?

    Hello! I have questions in regards to the Two Slit Experiment. If the photon splits in two and passes through both slits at the same time and interferes with itself on the other side of the screen and then it hits on the second screen thereby creating the interference pattern. At what point...
  38. us40

    Passing a black hole from double slit experiment setup

    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...
  39. O

    The double slit experiment the same old

    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...
  40. O

    Can interference occur without the use of single slit?

    I wonder can a sustained interference pattern be obtained in Young double slit experiment if we do not use single slit between source of light and the double slits when one has a monochromatic source in the experiment. Regards
  41. Amaterasu21

    Momentum conservation, the double slit and Heisenberg

    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...
  42. Q

    Single Slit Problems: 750nm Light & 2.0um Width

    Homework Statement At what angle will 750nm light produce a second minimum if the single-slit width is 2.0um Homework Equations Sin(theta)=n(lambda)/w The Attempt at a Solution This is what I got so far (theta)=sin-1(3x10^-6/2x10^-6) I don't understand why I keep getting error on my...
  43. C

    Double Slit Help: 2nd Order Dark Fringe Location

    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...
  44. G

    How to Calculate Intensity and Probability for Double Slit and Diffraction?

    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...
  45. J

    Exploring the Role of Measurement in the Young Double Slit Experiment

    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...
  46. diemilio

    Double Slit Experiment with Electrons

    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...
  47. M

    How Does the Two Slit Experiment Illustrate Quantum Duality?

    A couple of days ago i stumble across the two slit vid on youtube and entanglement. before this day i thought quantum physics was just some kind time travel mumbo jumbo ... I am sure you get my level of noobieness from this :) ok questions if you would be so kind :) ( don't forget the...
  48. Marceli

    Double Slit Experiments with Electrons

    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?
  49. N

    Double slit - why vertical strips?

    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...
  50. B

    How measurement in the double slit experiment affects result

    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...
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