Question

Refractive index of glass relative to water is 9/8. What is the refractive index of water relativeto glass?

Answer 1

8/9 will relative index of water relative to water

Answer 2

Refractive index of glass =3/2

refractive index of water =4/3

refractive index of water relative to glass

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

=8/9