The refractive index of water with respect to air is 4/3. What is the refractive index of air with respect to water?
The refractive index of water with respect to air is 4/3. What is the refractive index of air with respect to water?

Solution:

According to the question, the refractive index of water with respect to air is

air μwater = 4 / 3

We can easily determine the refractive index of air with respect to water in the following manner –

water μair = 1 / air μwater = 1 / (4 / 3)

water μair = 3 / 4

Therefore, water μair = 0.75