Question

The refractive index of a transparent medium is greater than one . why?

Answer 1

Explanation:

Here refractive index of medium is inversely proportional to speed of light in the medium. As refractive index of vacuum is 1, speed of light is always greater in vacuum as compared to transparent medium. Hence, refractive index of transparent medium is always greater than one.

Answer 2

Explanation:

b, coz refractive index (n) is nothing but the ratio of speed of light in vacuum (c) to the speed of light in that medium (v), n=c/v ,c is always greater than denominator so n is always greater and equal to 1.