Double-Slit Detector: How Physicists Detect Particles

In summary, physicists can detect if a charged particle goes through one slit or the other in the double-slit experiment by using changes in current flows placed at each slit. For particles with no charge, like photons, the experiment can be set up so that the photon's polarization is changed when it goes through a certain slit. This can then be detected by a polarizer at the end, allowing researchers to determine which slit the photon went through.
  • #1
chris2112
20
0
How exactly do physicists detect if a particle goes through one slit or the other in the double-slit experiment? Every book and article I read seems to elude this part.
 
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  • #2
Electrons are probably the most widely used particle, what you can do is put something around either slit like a circuit, that will react to the moving charge by having a current flow. that way you can tell whether or not it went through a particular slit.
 
  • #3
OK, so you can detect if a charged particle goes through one slit or the other by changes in current flows placed at each slit. What about particles with no charge like photons? Are there other methods or are certain particles like photons just omitted for the double slit experiment with detection?
 
  • #4
chris2112 said:
OK, so you can detect if a charged particle goes through one slit or the other by changes in current flows placed at each slit. What about particles with no charge like photons? Are there other methods or are certain particles like photons just omitted for the double slit experiment with detection?

You can set up your experiment so that a photon that goes through one slit or path is changed to a certain polarization. You can then have another polarizer that you can change that will let the photon through or block it depending on it's polarization. If it makes it to the detector you will know which slit it went through.
 

Related to Double-Slit Detector: How Physicists Detect Particles

1. How does a double-slit detector work?

A double-slit detector works by shining a beam of particles, such as electrons or photons, through two closely spaced slits onto a screen. The particles passing through the slits will interfere with each other, creating a pattern of light and dark fringes on the screen. This pattern can be recorded and analyzed to reveal information about the properties of the particles, such as their position and momentum.

2. What types of particles can be detected with a double-slit detector?

Double-slit detectors can be used to detect a wide range of particles, including electrons, photons, and even larger particles like atoms and molecules. The size and spacing of the slits can be adjusted to accommodate different types of particles, making this a versatile tool for particle detection in various fields of physics.

3. How do physicists use the results from a double-slit detector?

The results from a double-slit detector can provide valuable information about the behavior of particles and their underlying quantum properties. By analyzing the interference pattern, physicists can determine the position, momentum, and other characteristics of particles. This information can help to further our understanding of the fundamental laws of nature.

4. Can a double-slit detector be used to detect multiple particles at once?

Yes, a double-slit detector can be used to detect multiple particles at once. However, the interference pattern produced will become more complex, making it more difficult to analyze. To overcome this challenge, physicists have developed techniques such as using single particles at a time or using detectors with higher resolution to accurately measure the interference pattern.

5. Are there any limitations to using a double-slit detector?

While double-slit detectors are a powerful tool for detecting particles, they do have some limitations. For example, the results can be affected by environmental factors such as air currents or vibrations, which can disrupt the interference pattern. Additionally, the Heisenberg uncertainty principle states that it is impossible to know both the position and momentum of a particle with absolute certainty, which can introduce some uncertainty into the results obtained from a double-slit detector.

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