Question

what do you mean you refractive index

Answer 1

Hey here is your answer

1)Refractive index, also called index of refraction,

2)measure of the bending of a ray of light when passing from one medium into another. ...

3)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,

4)

Formula

n = c/v.

Hope you understand

Answer 2

Refractive Index is the extent of change of direction of light in a given pair of media. The refractive index is a relative value of speed of light in the given pair of media. Thus, to calculate the refractive Index the speed of light in two media is taken.

Let the speed of light in medium 1 is v1and in medium 2 is v2

Therefore; refractive index of medium 2 with respect to medium 1 (n21)

n21=Speed of light in medium 1/Speed of light in medium 2



Or, n21=v1/v2