Question

A block of glass with refractive index,w.5 is surrounded by air. A rat of light enters the block at its left-hand face with incident angle X and reemerges into the air from the right-hand face directed parallel to the block's base. Find X

Answer 1

$\frac{\sin y}{\sin x}=n,$

$y=90°,$ $\sin y=90°,$

$\frac 1{\sin x}=n,\implies$

$x=\arcsin\frac 1n=41.8°.$