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A beam of light is traveling in air and strikes a material. The angles of incidence...

A beam of light is traveling in air and strikes a material. The angles of incidence and refraction are 65.1° and 42.7°, respectively. Obtain the speed of light in the material.

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Answer #1

From Snell's law,

where,

n1 is the refractive index of first medium = air = 1

n2 is the refractive index of second medium

are the incident and the refracted angles respectively

thus

now we have the refractive index of second medium, we can determine the speed of light in that medium as

where,

c = spped of light = 3 x 108 m/s

thus

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