Question

Q. The velocity of light in a medium is 2*10^8 m/s. what is the
refractive index
of the medium with respect to air, if the velocity of light in air 3*10^8 m/s?​

Answer 1

Answer:

The refractive index of the medium = 1.5

Explanation:

Refractive index is defined as the ratio of the velocity of light in a vacuum to the velocity of light in a medium. It gives an idea about the speed of light in a medium in comparison with that in a vacuum or free space.

Refractive index = velocity of light in vacuum / velocity of light in the medium

                        n = c/v

So the refractive index of the medium will be,

n = (3 × 10⁸) / (2 × 10⁸)

n = 1.5

Since it is the ratio of the same quantity the refractive index has no unit.