Young's interference apparatus is found in carbon disulfide

The Young interference device located in carbon disulfide (n1 = 1.65) creates an interference pattern on the screen from sources S1 and S2 (Lambda = 500 nm). Let's consider what will happen to the picture on the screen P if a glass plate (n2 = 1.5) with a thickness of 20 microns is installed in the path of the beam d1. It is also necessary to determine how the optical path difference at the points of the screen will change.

So, when a beam passes through glass, it will be refracted, which means its speed and wavelength will change, which will lead to a change in the optical path difference. Let's calculate this change.

Initially, the optical path difference between the rays from sources S1 and S2 was equal to zero on the screen P, since they traveled the same distances. After the beam passes through a 20 µm thick plate with a refractive index n2 = 1.5, the optical path difference will change.

To calculate the change in the optical path difference, you must use the formula:

Δl = d * (n2 - n1)

where Δl is the change in the optical path difference, d is the thickness of the plate, n1 and n2 are the refractive indices for the media through which the rays pass.

Substituting the values, we get:

Dl = 20 μm * (1.5 - 1.65) = -3000 nm

Thus, the optical path difference will be reduced by 3000 nm. This will lead to a change in the interference pattern on the screen P.

Young's interference setup

This digital product is a description of the Young's interference setup found in carbon disulfide.

Using this setup, you can study the interference of light and obtain an interference pattern on the screen. Young's setup is a universal tool for studying the properties of light, in particular interference, and is used for scientific and educational purposes.

The description contains information about how light interference occurs, how Young's installation works, and what results can be obtained. The text is written in clear language and contains illustrations, which makes it accessible to a wide range of users.

By purchasing this digital product, you receive a high-quality and detailed description of Young's interference setup, which will be useful for your scientific and educational purposes.

Young's interference setup is in carbon disulfide with a refractive index n1 = 1.65. Light rays from sources S1 and S2 with a wavelength of Lambda = 500 nm pass through the installation, creating an interference pattern on the screen P. If a glass plate with a thickness of 20 microns and a refractive index n2 = 1.5 is placed in the path of beam d1, then the beam will be refracted, which will lead to a change in its speed and wavelength. This, in turn, will lead to a change in the optical path difference between the beams.

To calculate the change in the optical path difference, you must use the formula: Δl = d * (n2 - n1), where Δl is the change in the optical path difference, d is the thickness of the plate, n1 and n2 are the refractive indices for the media through which the rays pass.

Substituting the values, we get: Δl = 20 µm * (1.5 - 1.65) = -3000 nm. Thus, the optical path difference will be reduced by 3000 nm. This will lead to a change in the interference pattern on the screen P.

As a result, by purchasing the digital product "Young's Interference Installation", you receive a detailed description of this installation and its application for studying the properties of light and interference for scientific and educational purposes. The description provides information about how the installation works, how light interferes and what results can be obtained.


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Young's interference setup is an optical setup that allows you to observe the interference pattern from two point light sources. It consists of light sources S1 and S2, a screen P and an interferometer, which allows the light to be divided into two beams - d1 and d2, which then pass through different paths and interfere on the screen.

In this case, the installation is in carbon disulfide with a refractive index n1=1.65. Using the installation, you can observe the interference pattern from light sources S1 and S2 with a wavelength of Lambda = 500 nm.

If a glass plate 20 μm thick with a refractive index n2 = 1.5 is placed on the path of beam d1, then the optical path difference between beams d1 and d2 will change. The optical path difference will change by an amount equal to twice the thickness of the plate multiplied by the difference in refractive index. That is, the change in the optical path difference is equal to (22010^-6)*(1.5-1.65) = -0.012 μm.

Thus, the interference pattern on the screen P will change and will depend on the change in the optical path difference between the rays d1 and d2.


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  1. Young's interference apparatus is an excellent tool for studying optics.
  2. Excellent image quality and high measurement accuracy.
  3. Convenient and easy to use.
  4. An effective way to demonstrate the interference of light.
  5. Reliable design and durability.
  6. Ideal for educational purposes.
  7. Excellent price-quality ratio.
  8. Flawless performance and ease of use.
  9. Easy to assemble and disassemble.
  10. An excellent choice for physics students and teachers.

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