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A ray of light is incident at an angle of incidence , on one face of a prism of angle  (assumed to be small) and emerges normally from the opposite face. If the refractive index of the prism is , the angle of incidence , is nearly equal to

a)

b)

c)

d)



Question ID - 152493 | SaraNextGen Top Answer

A ray of light is incident at an angle of incidence , on one face of a prism of angle  (assumed to be small) and emerges normally from the opposite face. If the refractive index of the prism is , the angle of incidence , is nearly equal to

a)

b)

c)

d)

1 Answer
127 votes
Answer Key / Explanation : (a) -

(a)

For normally emerge

Therefore  and

Snell’s law for incident ray’s

For small angle

127 votes


127