When the angle of incidence on a material is `60^(@)`, the reflected light is completely polarised. The velocity of the refracted ray inside the materials is (in m//sec^(-1))

Options

A. `3xx10^(8)`
B. `(3/sqrt(2))xx10^(8)`
C. `sqrt(3)xx10^(8)`
D. `0.5xx10^(8)`

Answer

C

Explanation

`mu=tan 60^(@)=sqrt(3)`
`v=c/mu=(3xx10^(8))/sqrt(3)=sqrt(3)xx10^(8) m//sec`