Question

Refractive index of water is 4/3 and that of glass is 3/2 with respect to air . Calculate refractive index of glass with respect to water

Answer 1

Refractive index of glass w.r.t. water = (Refractive index of glass w.r.t. water) / (Refractive index of water w.r.t. air) = (3/2)/(4/3)=(3x3)/(2x4)=9/8.

Answer 2

It will be the ratio

1.5/1.33

=(3/2)/(4/3)

=9/8

=1.125