Question

If the speed of light in vaccum is 3 X 10^8 m/s , the absolute refractive index of a medium in which light travels with a speed of 1.4 X 10^8 m/s is _____________

a 1.42
b 4.2
c 2.14
d 0.47

Answer 1

Answer:

It is given that light travels with the speed of 1.4 x 10^8 m / s in that medium. And, From the properties of refraction, we know that the refractive Index of a transparent medium is the ratio of speed of light in air to the speed of light in that medium. We know that speed of light in air is 3 x 10^8 m / s.

It is given by the ratio of speed of light in vaccum to the speed of light in a medium. So, So, the absolute refractive index of a medium is 2.14.