Question

A beam of light passes from air into a substance of refractive index 1.41. If the angle of incidence is 45º, then the angle of refraction i​

Answer 1

Explanation:

Explanation: Refractive index when angle of incidence and angle of refraction are given=sin i/ sin r. So given that sin i=45° and sin r=30. So refractive index of a substance==sin i =45°=1/√2 and sin r= 30°=1/2.