Question

what is refractive index ?also explain its types?​

Answer 1

Explanation:

The refractive index is the measure of bending of a light ray when passing from one medium to another. It can also be defined as the ratio of the velocity of a light ray in an empty space to the velocity of light in a substance, n = c/v.

Answer 2

The refractive index of a medium is defined as the ratio of the speed of the light in vacuum to the speed of the light in that medium.
If “c” is the velocity of light in vacuum( which is 3x10^8 m/s) and v(m) is the speed in medium, then refractive index(n)=c/v(m).
For example) If the speed of light in glass is 2x10^8 m/s, then it’s refractive index is
n(g)=c/v(g)
Where n(g) is the refractive index of glass and v(g) is the velocity of light in glass.
So, n(g)=3x10^8/2x10^8
Therefore, n(g)=2
Refractive index is of 2 types,
One being Absolute which has been defined above and the other being Relative. Relative Refractive Index is the ratio of the refractive index of 2 media in contact.
If n(1) is the refractive index of media 1 and n(2) is the refractive index of media 2, then relative refractive index= n(1)/n(2)
I’ve tried my best to answer it correctly as per my knowledge. Hope you’re satisfied.