If the speed of light in water is `2.25 xx 10^8 m/s`
Calculate the speed of light in vacuum .

If the speed of light in water is 2.25 xx 10^8 m/s Calculate the speed of light in glass.

If the speed of light is 3.0xx10^8ms^(-1) calculate the distance covered by light in 2.00 ' nanosecond.

A light ray is travelling from air to water. Velocity of light in water is 2.25 x 10^8 m/s If angle of incidence is 30° calculate angle of refraction