Question

2. The speed of light in diamond is 125,000 km s.
What is its refractive index ? (Speed of light in air
= 3 x 108 m s-).
A​

Answer 1

Given: The speed of light in diamond is 125,000 km / s.

To find: What is its refractive index ?

Solution:

• Now we have given the speed of light in diamond is 125,000 km / s.

• We have also given the speed of light in vacuum = 3 × 10^8 m/s

• So speed of light in diamond will be:

                   125000 × 1000 m/s

                   1.25 × 10^8 m/s

• Now we know that refractive index is equal to speed of light vacuum upon speed of light in medium

                   Refractive Index  = 3 × 10^8 / 1.25 × 10^8

                   Refractive Index  = 2.4

Answer:

             So the refractive index is 2.4