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)`)
A. `3 xx 10^(8)`
B. `[(3)/(sqrt(2))]xx10^(8)`
C. `sqrt(3)xx10^(8)`
D. `0.5xx10^(8)`