Question

The absolute refractive index of water is 1.5.
What is the velocity of light in water?
(Velocity of light in vacuum = 3 x 108 m/s)​

Answer 1

Answer:

Refractive index= speed of light in air/ speed of light in medium

or, 1.5 = 3× 10^8/ speed of light in medium

or, speed of light in medium(water)

= 3×10^8/1.5

= 2 × 10^8 m/s