Slit Definition and 1000 Threads

Homework Statement After a laser beam passes through two thin parallel slits, the first completely dark fringes occur at ±14.0∘ with the original direction of the beam, as viewed on a screen far from the slits. A)What is the ratio of the distance between the slits to the wavelength of the...

Homework Statement In a Young’s double-slit experiment using light of wavelength λ, a thin piece of Plexiglas having index of refraction n covers one of the slits. If the center point on the screen is a dark spot instead of a bright spot, what is the minimum thickness of the Plexiglas...

Sometimes I see complementarity explained as being not able to measure any wave and particle property at the same time. But it looks like in a standard double slit experiment the detector measures both particles as the interference, so the wave. The same with a single slit. If a photon is...

I know this is a very trivial concept, so can someone please point out to me where I'm going wrong with this? We use coherent waves to observe an interference pattern, and coherence by definition is the presence of a constant phase difference between two waves. Yet, we see bright and dark...

Hello, I'm new here, but I've been researching this subject for several months now. I'm especially interested in the double-slit experiment performed with one electron at a time, particularly with the detection apparatus turned ON. I've found this statement, or something very much like...

What is the effect of decreasing the widths of slits in double slit experiment?

Homework Statement Two radio antennas separated by d = 294 m as shown in the figure below simultaneously broadcast identical signals at the same wavelength. A car travels due north along a straight line at position x = 1 290 m from the center point between the antennas, and its radio...

Hello, I've been trying to learn physics recently with the long term goal of understanding GR and cosmology. As a result, I have many questions, so I'll just get started.. In the famous double slit experiment, there is a coherent light source aimed at a double slit which produces an...

I'm a little confused about a small detail when finding the intensity over the screen, as some notes I'm using happen to calculate the same thing twice, with a slight difference the second time. Each method does the following Call the electric field at any point E so we have...

Homework Statement Light of intensity I0 passes through two sets of apparatus. One contains one slit and the other two slits. The slits have the same width. What is the ratio of the out going intensity amplitude for the central peak for the two-slit case compared to the single slit?Homework...

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...

Just a question about the naming of optical phenomena. I've taken these explanations from a book I'm using: Diffraction is when a single wave passes a slit or obstacle and spreads out. The single wave produces a diffraction pattern. Interference is when we have more than one source of...

In double slit experiments detection of individual electron has very massive effect on the result. Now suppose in dark room we perform double slit experiments with two observers (who cannot communicate with each other). Now those two observers have eyesight that can see individual electron in...

Hello, Very recently i learned about the quantum theories and the double slit experiment.. honestly i was startled from what i have seen and heard of the quantum laws known for us at this time.. Well i can't help it but my mind keeps asking zillions of questions and it's not stopping.. :P...

I know that a smaller width of a gap would lead to "more diffraction", and diffraction effects are at their peak when the wavelength of the diffracted waves is equal to the gap width. But what if the gap were smaller than the wavelength? Can someone describe the diffraction pattern (if any) that...

Hello, I have a quick question about the distinguishing features between a 'monochromatic light source' and a laser. In my notes on wave optics, I have a diagram of monochromatic light being diffracted through a single slit, to produce a coherent wave formation that then hits a double slit...

Homework Statement Explain the idea of complementarity in the context of the double slit experiment for electrons by using the Heisenberg Uncertainty principle. Homework Equations ΔxΔp ≥ h-bar/2 The Attempt at a Solution I understand the definition of complementarity but don't...

Hi, imagine setup with source of entangled photons (A and B). Photon A travels to double slit so that either wave or particle pattern can be observed, photon B hits detector either before (setup 1) or after (setup 2) photon A has hit screen. Question: Will setup 1 show interference pattern...

Hello, I am trying to recreate the double slit experiment using ordinary light, i.e. sunlight or light from a light bulb or torch. I do not wish to use a laser for various reasons. I have experimented with the distance, spacing, and width of the slits, but I cannot get an interference...

I've read that if you want light to diffract through a single slit, the slit opening must be equal too or less than the wavelength of the light. So for example, light of wavelength 600nm would diffract through a slit with width 600nm or less. Is this true? Or am I missing something. Since when I...

Hi all. I am just trying to get my head around the double slit experiment(I know I am not the first) I am stuck trying to understand the initial state of the individual photons when they are being fired sequentially.(their direction and place of origin)(where the quantum confusion sets in) An...

I have a disagreement with a Quantum mechanical scientist about a double slit experiment with polarizers, which gives interference or not depending on "which path" knowledge of the photon. That is alright with me, but I can calculate the same results with classical wave formula. He does not...

Homework Statement Part(d): Find an expression for y Part (e): Sketch the interference pattern on screen and locate maximas Part (f): One slit is covered by a film that reduces amplitude by half. Explain how the interference pattern changes. Part (g): The film is now replaced...

What happens if the screen in young's double slit experiment is replaced with a photoelectric material? Electrons should be emitted only from regions where constructive interference occurs! Doesn't that mean in this case light will depic both wave and particle nature? That is clearly not...

Do we presume the light beams to be parallel even though they meet at one place? like the image here http://hyperphysics.phy-astr.gsu.edu/hbase/phyopt/sinslit.html

I was reading about the double slit experiment, and had an idea. Can anyone tell me if there is a test which negates this idea - or if someone has proposed/proven it. Say the photon goes through one slit, but a super small amount of energy (currently not possible to recognize as being...

First I want to admit that I'm not a physicist, but I'm very interested in physics. I have some questions about quantum mechanism that I haven't been able to find the answer through prolonged internet search, and I registered this site just to get answers to these questions. One of my...

In class we did a lab regarding the wave nature of light. We pretty much conducted Young's double slit experiment. For the lab we were supposed to establish the relationship between the distance from the slits to the viewing screen and the distance between successive maxima. Can anyone...

Hi, I'm not a scientist, but a documentary filmmaker doing research on the nature of reality. An essential disclaimer as my question might seem a bit superficial to most you guys who work in the field. I would like to know how the pilot wave theory to quantum mechanics explains the double...

I recently learned about the electron double slit experiment, and I'd like to know more about the detectors used to track which slit the electron passes through. When the detector is turn on, the electron acts like a particle, and when it's turned off, the electron acts like a wave. I'm...

Something I've wondered about the Double Slit Experiment is what happens to photons which fail to pass through either slit, and what is their behavior? Why not put some detectors on the source side of the slits during a double slit experiment to try to determine whether the photons are...

Propose this measurement: It is a well know interference measurement, but now asymmetrical. Suppose the red path is 1 m and the blue path 10 m. If you measure the time between detector 1 and 2 I expect you will find two times: 3.3 ns and 33 ns. Then you know which path the photon took...

Apologies in advance. I have only the most cursory exposure to qm physics. The famous slit experiment. Clearly, the slit experiment has been performed countless times... What I have not heard: - What happened when detectors were set to observe both slits? - As detectors are...

What happen if I send electron 1 at a time and I use a detector but my detector don't show result neither record it (I setup it that way)? I presume the interference pattern is destroyed since the detector detect in which slit the electron go ? Do I am correct?

Okay it's been well established that objects with momentum exhibit wave like properties. Hence, electrons being observed forming interference patterns when scattering off of crystal lattices. Also I recently read this webpage. At the bottom it mentions performing a double slit experiment with...

I have to do an experiment for my physics class and I was thinking of doing the double slit experiment. Ideally I'd like to do the single photon version if its possible but I realize that's probably too ambitious. If I used neutral density filters to reduce the output from a laser pointer how...

Hi In double slit experiment our observe can change the past and in the entanglement our observe affact other particle pair. How could such a thing possible ?

Homework Statement Suppose that light is incident on a double slit apparatus, with a slit separation d at an angle of ∅ (phi) to the normal (see attached diagram). A) Derive an equation; in terms of the variables d, ∅, θ, integers m, and the wavelength λ of the incoming light; that yields the...

Homework Statement 1. From conservation of energy point of view if single and double slits, and diffraction grating had slits of same width, how should their overall light intestines compare 2. under what conditions can we consider double-slits intensities as approximately constant...

This is another one of those things that I had always assumed to have a very simple explanation. After all, I've seen so many simulations of waves interfering with each other and forming the distinctive interference pattern, and even watched the patterns emerge in actual water waves. The pattern...

Homework Statement A double slit apparatus is illuminated 730 and 558 nm wavelengths. They form a two-colored interference pattern on a measuring screen located at a distance of 2.28 m from the slits. The slit separation is 42 wavelengths of 730 nm light. (a) What order (m) intensity maximum...

At opticians they use slit lamps. Does anyone know if they are safe for the human eye (the light can be bright and annoying)? I'd imagine they'd have safety checks on that kind of stuff. Anyone can answer?

I was thinking of finding a new hobby, and thought that playing around with the double slit experiment might be interesting. I was wondering how feasible it would be to set up the double slit experiment, not simply the laser and slit version shown here...

The double slit experiment shows that light is a wave, unless observed at the point where photons enter the slits. If observed there, the result of the experiment shows light as particles. What I want to know is: 1.) What instruments are used to observe the photons as it passes through the...

Homework Statement A single slit forms a diffraction pattern with monochromatic light. The 4th minimum of the pattern occurs at an angle of 35 degrees from the central maximum. How many bright bands are on each side of the central maximum?Homework Equations Number of minimum brightness bands =...

Homework Statement "A TV tube manufacturer is attempting to improve the picture resolution, while keeping costs down, by designing an electron gun that produces an electron beam which will make the smallest possible spot on the face of the tube, using only an electron emitting cathode followed...

Suppose a slit much wider than photons from a coherent source is placed in front of the source. Let this slit be opened and closed at a rate faster than one wavelength of the source. Will light pass through the slit?

Is it the same thing as Bragg diffraction, in the sense that it is caused by the photons being scattered in different directions when it hits the atoms of the solid material around the slit?

Homework Statement In a young's double slit experiment the slits have the same width and are separated by a distance a. an observation screen is placed at a distance L=1m from the slits at a point on the screen a distance y from the optical axis the optical path difference between the 2 waves...

Homework Statement A 0.42 -mm-diameter hole is illuminated by light of wavelength 510nm. What is the width (in mm) of the central maximum on a screen 1.8m behind the slit? Homework Equations f=λx/s The Attempt at a Solution I tried two answers, 4.4mm and 2.2mm and they are both...