The refractive index of diamond is 2.4. If the velocity of light in air or vacuum is $3\times {10}^{8}m{s}^{-1}$, then the velocity of light in diamond is .........$\times {10}^{8}m{s}^{-1}$.

The velocity of light in diamond is 1,21,000 km s^-1. The refractive index of the diamond is (Velocity of Light in air = 3 x 10⁸ m s^-1).

The speed of light in diamond is 125,000 km $m{s}^{-1}$. What is its refractive index? (Speed of light in air = 3 $\times {10}^{8}m{s}^{-1}$ )

Light enters from air into diamond which has a refractive index of 2.42. Calculate the speed of light in diamond. The speed of light in air is 3.0 x ${10}^{8}m{s}^{-1}$.