Question

Light travel through a glass of thickness $t$ and refractive index $n$.If $c$ is the velocity of light in vacuum, the time taken by light to travel through the plate is:

Answer 1

Given, $Thickness=t$ Refrective index$=\mu$

Since the optical distance in a medium of refractive index $\mu$ and thickness $t$ is $\mu x$

Therefore time is taken $\frac{\mu x}{c}$ Where c is the velocity of light