Q.

A ray of light is incident on a glass plate at an angle of 60. What is the refractive index of glass if the reflected and refracted rays are perpendicular to each other?

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a

sin 60

b

cot 60

c

cos 60

d

tan 60

answer is A.

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Detailed Solution

60 is polarising angle. Use Brewster's law

μ=tanip=tan60

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A ray of light is incident on a glass plate at an angle of 60∘. What is the refractive index of glass if the reflected and refracted rays are perpendicular to each other?