Question

Q.4. Define the refractive index. The refractive index of diamond is 2.42. What is the meaning of this
statement?​

Answer 1

Answer:

the deflection produced by any medium by which it deflects the light

Answer 2

Answer:

This means that the speed of light in diamond will reduce by a factor of 2.42 as compared to its speed in air. ... In other words, the speed of light in diamond is 1/2.42 times the speed of light in vacuum.

Refractive index, also called index of refraction, measure of the bending of a ray of light when passing from one medium into another. ... Refractive index is also equal to the velocity of light c of a given wavelength in empty space divided by its velocity v in a substance, or n = c/v.