If the refractive index of diamond is 2.4 find the velocity of light in diamond.(c=`3xx10^(8)`m/s)

The value of refractive index of diamond is

The value of refractive index of diamond

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 )