Question

For the same angle of incidence, the angle of refraction in four media A, B, C and D are 25°, 30°, 35° and 40° respectively. The speed of light is least in medium ______.

Options

• D

• C

• B

• A

Answer 1

For the same angle of incidence, the angle of refraction in four media A, B, C and D are 25°, 30°, 35° and 40° respectively. The speed of light is least in medium A.

Explanation:

r_A = 25°, r_B = 30°, r_C= 35°, r_D = 40°

Since the angle of refraction is lowest in medium A, means bending of light is highest. So the speed of light will be least in medium A.