Question

indicate the dependence of refractive index with the density of medium​

Answer 1

So as the index of refraction value increases, the optical density increases, and the speed of light in that material decreases.

Answer 2

Explanation:

The refractive index depends on the number density of molecules and the polarizability of the molecules that make up the material.

Optical Density and the Index of Refraction Like any wave, the speed of a light wave is dependent upon the properties of the medium. In the case of an electromagnetic wave, the speed of the wave depends upon the optical density of that material. The optical density of a medium is not the same as its physical density.