Question

For the same angle of incidence the angle of refraction

Answer 1

Answer:

ello didn't get your question.. .. .

Answer 2

The more the deviation from incident ray, the more is the optical density of the medium and less will be the speed.

incident = 45

refraction angle:

a ----> 30, deviation = 45-30 = 15

b ----> 40, deviation = 45-40 = 5

c ----> 45, deviation = 45-45 = 0

So the velocity will be maximum in C as deviation is minimum.

Note: The incident and refracted angle are the same in medium C. So there is no change in optical density of medium. So in third case, there is no refraction.