Question

RI of air wrt glass in 2/3 and water wrt air is 4/3 . Find RI glass wrt water.

please reply me fast
it's urgent ​

Answer 1

Answer:

Refractive index of glass wrt water ( glass n water) = (glass n air)× (air n water) = (glass n air)× (1/water n air) = 4/3 × 2/3 = 8/9.