Question

A light ray falls on the air glass interface at an angle of ${30}^{\circ }$. What is the angle of refraction for this rays ?
$(n_{ag}=\frac{3}{2})$.

Answer 1

Given ,

$n_{ag}=\frac{3}{2}\angle i={30}^0$

From snell's law

$n=\frac{sini}{sinr}$

By putting values of n, i in equation

we get

$\frac{3}{2}=\frac{sin{30}^0}{sinr}$

$\Rightarrow sinr=\frac{1}{3}r={19}^0{47}^{\prime }{\simeq 20}^0$

the angle of refraction is 20 degree.