Question

refractive index of glass relative to water is 9/8.what is the refractive index of water relative to glass?

Answer 1

8/9 is the answer for this question
Hope it helps you buddy.......

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