Are the rays parallel after they come out of the prism?

In summary, when two rays of light fall on a surface of a prism, they will remain parallel after they come out from the prism if they have the same wavelengths and the incidence and refraction angles are equal due to Snell's Law. This is assuming a geometrical study of light and a monochromatic (single wavelength) case.
  • #1
zade70
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Homework Statement


Two rays of light fall on a surface of the prism. Do they remain parallel after they come out from the prism?

Homework Equations


sina/sinb=n2/n1

The Attempt at a Solution


I think they do, as the incidence angles are equal, the refraction angles are equal they become incidence angles which are still equal and will have equal refraction angles.
 
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  • #2
They will remain parallel only if they have the same wavelengths.
 
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  • #3
blue_leaf77 said:
They will remain parallel only if they have the same wavelengths.
We are studying at the light just in the geometrical aspect. Can you give me a hist to solve it basing on it?
 
  • #4
zade70 said:
We are studying at the light just in the geometrical aspect.
Then I guess the lecture currently still assume monochromatic (single wavelength) case and of course your answer should be correct.
 
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1. What is a prism?

A prism is a transparent optical element with flat, polished surfaces that refract (bend) light. It is typically made of glass or plastic and has a triangular shape.

2. How does a prism work?

When light enters a prism, it is refracted (bent) at each of the two surfaces it encounters. The amount of refraction depends on the angle of incidence and the properties of the prism material. As the light passes through the prism, it is separated into its component colors (wavelengths) due to the different amounts of refraction for each color.

3. Why do rays of light appear to be parallel after passing through a prism?

When light enters a prism, it is refracted (bent) at each of the two surfaces it encounters. The second refraction counteracts the first one, resulting in the rays of light emerging from the prism parallel to each other.

4. Are the rays always parallel after they come out of the prism?

No, the rays of light are not always parallel after they come out of the prism. The amount of refraction and the angle of emergence can vary depending on the properties of the prism and the angle of incidence of the light.

5. What determines the angle of emergence of the rays after they come out of the prism?

The angle of emergence of the rays after they come out of the prism is determined by the properties of the prism material and the angle of incidence of the light. It can also be affected by the shape and orientation of the prism.

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