What is absolute refractive index ? On what factor does it depend.

Explanation

Absolute refractive index : The refractive index of a medium with respect to vacuum (or in practice air) is called its absolute refractive index.
`therefore n-c/v`
Dimensional formula of refractive index : `M^@ L^@ T^@`
Value of refractive index of any medium depends on type of medium, temperature of medium and wavelength of light.