Poor man's double slit etc. setup

In summary, the cheapest commercially available double slit experiment setup for quantum state experiments, such as with qubits, is a tube with a double slit and a monitor for output, which costs around $200. However, there are other options available, such as a household object or a homemade setup using a glass slide, a laser pointer, and a soot-covered slide. It is possible to create single-photon interference with a laser pointer, but it is important to use a monochromatic light source for accurate results. However, it is recommended to have a good understanding of classical interference before attempting to understand the quantum picture.
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Concerning the original question: Have you tried youtube? For instance
 
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A lab tried to build its own Mach-Zehnder Interferometer experiment.. but the length of upper path and lower path has to be kept at the nano-meter level or both detector A and detector B would be triggered. A right setup should only have one detector trigger.. and they can't do it..


According to http://www.users.csbsju.edu/~frioux/two-slit/MZ-WhichWay.pdf "The detection of the photon exclusively at Dx is the equivalent of the appearance of the interference fringes in the double-slit experiment."

It is said 9 out of 10 use interfometer for which way path experiment. I'm looking for description of actual experiments (the 1 out of 10) where they use double slits.. single photon source.. and single photon detector.. why is single photon detector so difficult? and what is the complete setup for this test? So even if you hide a tiny camera in one of the slits.. the photon or electron knows? how about any that won't cause decoherence or is the explanation of the following correct?

https://www.st-andrews.ac.uk/~kd1/PH5015/Rempe.pdf

"The principle of complementarity refers to the ability of quantum-mechanical entities to behave as particles or waves under different experimental conditions. For example, in the famous double-slit experiment, a single electron can apparently pass through both apertures simultaneously, forming an interference pattern. But if a`which-way' detector is employed to determine the particle's path,the interference pattern is destroyed.This is usually explained in terms of Heisenberg's uncertainty principle, in which the acquisition of spatial information increases the uncertainty in the particle's momentum, thus destroying the interference."

Is this explanation correct? If not, what is the correct explanation? Thank you.
 
<h2>1. What is the "Poor man's double slit setup"?</h2><p>The "Poor man's double slit setup" is a simple and inexpensive experimental setup that demonstrates the wave-like behavior of light. It involves shining a laser or light source through two narrow slits and observing the interference pattern created by the light waves passing through the slits.</p><h2>2. How does the "Poor man's double slit setup" work?</h2><p>The setup works by allowing light to pass through two narrow slits, creating two coherent sources of light waves. These waves then interfere with each other, creating an interference pattern on a screen placed behind the slits. The pattern is a result of the constructive and destructive interference of the waves, demonstrating the wave-like nature of light.</p><h2>3. What materials are needed for the "Poor man's double slit setup"?</h2><p>The materials needed for the setup include a laser or light source, two narrow slits (such as razor blades or thin wires), a screen to capture the interference pattern, and a support structure to hold the slits and screen in place. Optional materials include a ruler or protractor to measure the distances between the slits and the screen.</p><h2>4. What can the "Poor man's double slit setup" be used to demonstrate?</h2><p>The setup can be used to demonstrate the wave-like behavior of light, as well as concepts such as interference and diffraction. It can also be used to measure the wavelength of light, as the distance between the slits and the interference pattern can be used to calculate the wavelength.</p><h2>5. Are there any limitations to the "Poor man's double slit setup"?</h2><p>While the setup is a simple and effective way to demonstrate the wave-like behavior of light, it does have some limitations. The interference pattern may be difficult to see with low-intensity light sources, and the slits must be very narrow and evenly spaced for the pattern to be clear. Additionally, the setup may not work well with non-coherent light sources, such as a regular lightbulb.</p>

1. What is the "Poor man's double slit setup"?

The "Poor man's double slit setup" is a simple and inexpensive experimental setup that demonstrates the wave-like behavior of light. It involves shining a laser or light source through two narrow slits and observing the interference pattern created by the light waves passing through the slits.

2. How does the "Poor man's double slit setup" work?

The setup works by allowing light to pass through two narrow slits, creating two coherent sources of light waves. These waves then interfere with each other, creating an interference pattern on a screen placed behind the slits. The pattern is a result of the constructive and destructive interference of the waves, demonstrating the wave-like nature of light.

3. What materials are needed for the "Poor man's double slit setup"?

The materials needed for the setup include a laser or light source, two narrow slits (such as razor blades or thin wires), a screen to capture the interference pattern, and a support structure to hold the slits and screen in place. Optional materials include a ruler or protractor to measure the distances between the slits and the screen.

4. What can the "Poor man's double slit setup" be used to demonstrate?

The setup can be used to demonstrate the wave-like behavior of light, as well as concepts such as interference and diffraction. It can also be used to measure the wavelength of light, as the distance between the slits and the interference pattern can be used to calculate the wavelength.

5. Are there any limitations to the "Poor man's double slit setup"?

While the setup is a simple and effective way to demonstrate the wave-like behavior of light, it does have some limitations. The interference pattern may be difficult to see with low-intensity light sources, and the slits must be very narrow and evenly spaced for the pattern to be clear. Additionally, the setup may not work well with non-coherent light sources, such as a regular lightbulb.

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