Question

A ray of light, incident or an equilateral glass prism $({\mu }_g-\sqrt{3})$ moves parallel to the base line of the prism inside it.Find the angle of incidence for the ray

Answer 1

So angle of reflection $={30}^0$

${\mu }_g=\sqrt{3}$ given

So from snell's law

${\mu }_a\sin i={\mu }_g\sin r$

$\sin i=\sqrt{3}\sin {30}^0$

$\sin i=\frac{\sqrt{3}}{2}$

$i={60}^0$