Question

The refractive index of a glass with respect to air is 3 by 2 what will be the refractive index of air with respect to glass

Answer 1

so the answer is 2/3 for refractive index of glass with repect to air

Answer 2

given,

Refractive index of water wrt air = 4/3

Refractive index of glass wrt air = 3/2

Refractive index of glass wrt water ( glass n water) = Ref. index of water/ Ref. index of glass

= 4/3 divided by 3/2

= 4/3 x 2/3

= 8/9