In glass, the velocity of light is minimum for

A ray of light is incident on a glass slab making an angle of 25^@ with the surface. Calculate the angle of refraction in glass and velocity of light in glass, if the, refractive index of glass and velocity of light are 1.5 and 3 xx 10^8 m/s respectively.

Refractive index of glass is 1.5. What is the velocity of light in glass?

If the refractive index of glass is 1.5. Find the velocity of light in glass. (Velocity of light in vacuum = 3 xx 10^(8) m//s )