The critical angle for glass air interface is `C` and for glass water interface is `c'`. How are `C and C'` related ?

Explanation

`sin C = (1)/(.^a mu_g) = (1)/(3//2) = (2)/(3)`, and
`sin C' = (1)/(.^w mu_g) = (1)/(9//8) = (8)/(9)`
As `sin C' gt sin C :. C' gt C`.