Question

The refractive index of glass with respect to air is `5/4` and the refractive index of water with respect to air is `4/3`. Then what will be the refractive index of glass with respect to water?

Answer 1

Refractive index of water w.r.t. air = `4/3`

Refractive index of glass w.r.t. air = `5/4`

So, the refractive index of glass with respect to water = `"Refractive index of glass"/"Refractive index of water"`

= `(5/4)/(4/3)`

= `15/16`