Refraction by Plane Surfaces: Practice Problem & Solution

Solution Explained:

To solve this problem, we apply the core principles of Refraction by Plane Surfaces. Understanding the underlying formula is key to arriving at the correct answer below:

The velocity of light in the glass medium is $v = \frac{c}{\mu}$.
Time taken to travel thickness t is given by $T = \frac{distance}{velocity} = \frac{t}{v}$.
Substituting the velocity, $T = \frac{t}{c/\mu} = \frac{\mu t}{c}$.