Velocity oflight through a mediumis `1.5 x 10^8 m/sec`. Then find the R.I. of that medium.

Velocity of light in transparent medium is 2 xx 10^8 m/sec. Calculate the refractive index.

The speed of light through diamond (mu_0 = 2.4) is 1.25 xx 10^8 m//sec . The speed of light in air (mu_n = 1.0) and glass (mu _ v = 1.5) in (m/sec) respectively are.