Answer 1

Given: 

`""_amu_g=3/2, ""_amu_w=4/3`

Find: `""_wmu_g`

Formula:  `""_wmu_g=(""_amu_g)/(""_amu_w)`

solution: `""a_mu_g=C_a/C_g and ""_amu_w=C_a/C_w`

`""_wmu_g=C_w/C_g`

From Formula 

`""_amu_g=(3/2)/(4/3)`

`""_wmu_g=1.12`

The refractive index of glass w.r.t. water is 1.12.