Question

A ray of light is incident normally on a glass slab. What time will it take to go through the slab of thickness "d" if the velocity of light in air is "v" and the refractive index of glass is 1.5?

A) d/v
B) v/d
C) v
D) 1.5d

Answer 1

The time it takes for light to go through the glass slab of a given thickness can be calculated using the formula Time = Distance/Speed. In this case, the correct option is A) d/v.

Step-by-step explanation:

When a ray of light is incident normally on a glass slab, it passes straight through without bending. The time it takes for light to travel through the glass slab is directly proportional to the thickness of the slab. Therefore, the time it takes for light to go through the slab of thickness 'd' can be calculated using the formula:

Time = Distance/Speed

Since the distance is 'd' and the speed of light in air is 'v', the correct option is A) d/v.