Given below are refractive indices of a few material media.
Rock salt - 1.54
Ice - 1.31
Dense flint glass - 1.65
Crown glass - 1.52
Arrange the media in the ascending order of optical density.
Optical density of a substance is the degree to which it will slow down the ray of light passing through it.
Higher the refractive index of a substance, higher will be its optical density.
Optical density in ascending order will be :
Ice - 1.31
Crown glass - 1.52
Rock salt - 1.54
Dense flint glass - 1.65