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

Options

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

Answer

C

Explanation

From Brewster's law, `mu=tani_(p)rArrc/v=tan 60^(@)=sqrt(3)`
`rArrv=c/sqrt(3)=(3xx10^(8))/sqrt(3)=sqrt(3)xx10^(8)ms^(-1)`