Question

what is absolute refractive index what is unit of refractive index​

Answer 1

$\huge \mathfrak\red{Answer:-}$

$\large\underline\mathrm{refractive \: index:-}$

It is depend as the velocity of light in vaccum to the velocity of light in medium . It denoted by M.

$\implies$ M = C/V

M is unitless and dimensions also it doesn't depend on the amount of the material.

$\large\underline\mathrm{Hope \: it \: helps \: you \: plz \: mark \: me \: brainlist}$

Answer 2

Absolute refractive index is the ratio of light in vaccum to the speed of light in the given medium !

the unit of refractive index is ; it has no S.I unit !