The velocity of light in glass medium is `2 xx 10^(8)m//s`. The refractive index of glass if speed of light in air is `3 xx 10^(8)m//s` is

Options

A. `1.5`
B. `1.25`
C. `2.5`
D. `2.25`

Answer

A

Explanation

`mu_(g) = (v_(a))/(v_(g)) = (3 xx 10^(8))/(2 xx 10^(8)) = 1.5`