Question

The refractive index of diamond is 2.47 and that of glass is 1.51 . How much faster does light travel in glass than in diamond ?

Answer 1

Explanation:

(Speed of light in glass)/(Speed of light in diamond) = (c/1.51)/(c/2.42) = (2.42/1.51) = 1.602. Light travels 1.602 times faster in glass than in diamond. Answer: Light travels 1.636 times faster in glass than in diamond