Q18 of 284 Page 228

What is meant by the refractive index of a substance?

The relation between the angle of incidence and the angle of refraction for a medium is known as refractive index of that medium.


More from this chapter

All 284 →
17

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.

 18

State and explain the laws of refraction of light with the help of a labeled diagram.

 18

Light travels through air at 300 million ms-1. On entering water it slows down to 225 million ms-1. Calculate the refractive index of water.

 19

The refractive indices of four substances P, Q, Rand S are 1.50, 1.36, 1.77 and 1.31 respectively. The speed of light is the maximum in the substance: