Refraction Through Prism

Physics

definition

Prism

A prism is a transparent refracting medium bounded  by five plane surfaces inclined at some angles. It bends a light two times and emergent ray is at an angle to the incident ray.

example

Calculate angle of minimum deviation of light ray passing through prism

The Angle of Deviation is the angle equal to the difference between the angle of incidence and the angle of refraction of a ray of light passing through the surface between one medium and another of different refractive index.

Example: A prism has a refractive index and refracting angle . Find the minimum deviation produced by prism.

Solution:
At minimum deviation,
And,


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