Refractive index of glass with respect to water is `(9//8)`.
Refractive index of glass with respect to air is `(3//2)`. find the refractive index of water with respect to air .

Answer

C, D

Explanation

Given `._(w)mu_(g) = 9//8` and `._amu_(g) = 3//2`
As `._amu_(g)xx._(g)mu_(w)xx._(w)mu_a=1`
`:. (1)/(._(w)mu_(a))=._(a)mu_(w)=._amu_(g)xx._(g)mu_(w)= (._amu_(g))/(._(w)mu_(g))`
`:. ._amu_(w) = (3//2)/(9//8) = (4)/(3)`