If rafractive index of glass w.r.t. air is `3//2`, what is the refractive index of air w.r.t. glass?

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

If the refractive index of glass with respect to air is (3)/(2) , what is the refractive index of air with respect to glass ?

If the refractive index of glass with respect to air is (3)/(2) , what is the refractive index of air with respect to glass ?

The refractive index of air w.r.t glass is 2//3 .The refractive index of diamond w.r.t. air is 12//5 .What is the refrative index of glass w.r.t. diamond?

The refractive index of glass with respect to air is 1.6. The refractive index of air w.r.t. glass is