A light ray falls on the air glass interface at an angle of 30∘. What is the angle of refraction for this rays ?
(nag=32).
Given ,
nag=32∠i=300
From snell's law
n=sinisinr
By putting values of n, i in equation
we get
32=sin300sinr
⇒sinr=13r=19047′≃200
the angle of refraction is 20 degree.