Question

what is refractive index ​

Answer 1

Answer:

In optics, the refractive index or index of refraction of a material is a dimensionless number that describes how fast light travels through the material. It is defined as. where c is the speed of light in vacuum and v is the phase velocity of light in the medium.

Explanation

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Answer 2

Answer:

the ratio sine of angle of incidence to the sine of angle of refraction

Explanation: