What is the refractive index of a medium , if a light wave of frequency ` 5 xx 10^(14)` Hz has a wavelength of ` 4 xx 10^(-7)` m in the medium ?

Options

A. `1.1 `
B. `1.33`
C. `1.5`
D. `0.67`

Answer

C

Explanation

`V=n lambda= 5 xx 10^(14) xx 4 xx 10^(-7)=2 xx 10^(8) m//s `
`:. n=(3 xx 10^(8))/( 2 xx 10^(8))=1.5`