Question

what is refractive index ?​

Answer 1

Answer:

Velocity of light passing through medium with respect to velocity of light in vaccum i.e (3×10^8 m/s) is called as absolute refractive index of that medium.

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Answer 2

When Light enter from one medium to another the light bends due to the change of speed of light in different medium

Refractive index means refraction (bending) of light with respect to vaccum

The refractive index of vaccum is 1

Refractive index can never be same as the medium differs always