Question

A ray of light passes from the air into a long glass plate of refractive index n at an angle to the edge of the plate.

Answer 1

Answer:

Explanation:

refractive index is Sin(i)/Sin(r)

so, 1.5=Sin(30)/Sin(r)

this implies sin(r)=0.5/1.5

r=sin^-1(1/3)

r=19.47