Question

For the same angle of incidence in media A, B &C the angles of refraction are 20 degree, 30 degree and 40 degree respectively. In which medium will the velocity of light be maximum. Give reason in support of your answer.

Answer 1

C
because the refraction angle is more that is medium has less density compare to the others hence the velocity of light will be more on medium C

Answer 2

From Snell’s law

n = sin i /sin r = c/v

Since c and sin i are constant therefore sin r is directly proportional to v

Therefore velocity of light is maximum in medium C.

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