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. `sqrt3xx10^(8)`
D. `0.5xx10^(8)`

Answer

C

Explanation

From Brewster's law, `mu=tani_(p)`
`rArr" "c/v=tan60^(@)=sqrt3`
`rArr" "v=c/sqrt3=(3xx10^(8))/sqrt3`
`=sqrt3xx10^(8)ms^(-1)`