Question

A light ray is incident on air-liquid interface at 45°and is refracted at 30°. What is the
refractive index of the liquid? For what angle of incidence will the angle between reflected
ray and refracted ray be 90°?
​

Answer 1

Answer:

Sin i/Sin r= n

n= Sin45/Sin30

n=1/root2/1/2

n=2/root2