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. `3 xx 10^(8)`
B. `(3)/(sqrt(2)) xx 10^(8)`
C. `sqrt(3) xx 10^(8)`
D. `0.5 xx 10^(8)`

Answer

C

Explanation

`n= tantheta_(B)= tan60^(@)= sqrt(3)`
`v= (c)/(n)= (3 xx 10^(8))/(sqrt(3))`
`implies v= sqrt(3) xx 10^(8) m//s`