Question

explain briefly about absolute refractive index​

Answer 1

Answer:

The absolute refractive index is defined as the ratio of the speed of light in vacuum and in the given medium. The absolute refractive index should never be less than 1.

Absolute refractive index of a medium is defined as the ratio of the velocity of light in vacuum to the velocity of light in the medium. If c is the velocity of light in vacuum and v in the medium, then n = c/v.

Answer 2

The refractive index of a medium with respect to vacuum is called absolute refractive index of the medium. The absolute refractive index of a medium is simply called its refractive index.

Mathematically it can also be expressed as,

$_{1} \mu_{2} = \frac{speed \: of \: light \: in \: medium}{speed \: of \: light \: in \:vaccum}$

For glass/water pair,

$_{w} \mu_{g} = \frac{_{a} \mu_{g}}{_{a} \mu_{w}}$