Question

define refractive index​

Answer 1

Heya..,

Your answer is here..,

Refrective index:- The ratio of velocity of light in a vacuum to its velocity in a specified medium its called Refrective index.

hope its will helpful to you..

Answer 2

the ratio of the valocity of light in a vacuum to its valocity in a specified medium........................ plz mark as brainlist