The refractive index of glass is 1.7. Calculate the speed of light in glass. The speed of light in air is 3.0 x 10⁸ ms^-1

The speed of light in air is 3 x 10⁸ m/s. In medium X its speed is 2 x 10⁸ m/s and in medium Y the speed of light is 2.5 x 108 m/s. Calculate:

(a) airⁿx = ?

(b) airⁿy = ?

(c) aⁿy

What is the speed of light in a medium of refractive index 1.4 if its speed in air is 3, 00,000 km/s?

The speed of light in water is 2.25 x 10⁸ m/s. If the speed of light in vacuum be 3 x 10⁸ m/s, calculate the refractive index of water.

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 x10⁸ ms^-1.