Define absolute refractive index.

Define absolute zero.

Can absolute refractive index of any material be less than one? Why?

Define absolute error.

Define refractive index?

A glass of refractive index 1.45 disappears when immersed in a liquid. What is the value of refractive index of the light?

Derive a relation between refractive index and critical angle.

If refractive index of glass w.r.t. air is 1.55, then what is the refractive index of air w.r.t. glass.