Light travels through a glass plate of thickness $t$ and having a refractive index $\mu$. If $c$ is

Question

Light travels through a glass plate of thickness $t$ and having a refractive index $\mu$. If $c$ is the velocity of light in vacuum, the time taken by light to travel this thickness of glass is\

Professor PC Thomas Classes · Answer

(b) : Time $=\frac{	ext { distance }}{	ext { velocity }}=\frac{t}{v}=\frac{t}{c / \mu}=\frac{\mu t}{c}$\