When the angle of incidence is 60^ on the surface of a glass slab, it is found that the reflected ray is completely polarised. The velocity of light in glass is

Step-by-step solution

Refractive index of glass, aligned _ g &= _ p where _ P &= polarising angle _ g &= 60^ = 3 aligned Now, _ g = c v_ g aligned c v_ g &= 3 v_ g = 3 10⁸ 3 &= 3 10⁸ ~m / s aligned