Question

For the same angle of incidence in media A,B,C,the angles of refraction are 20°,30°,40°.In which medium will the velocity of light will be maximum?Give reason?​

Answer 1

From snells law

n=sini/sinr =c/v

since c and sini are constant therefore sin r proposal to v

therefore velocity of light is maximum in 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. i.e. 40 degrees