Question

Refractive index of glass with respect to air is 1.5 and refractive index of water with respect to air is 4/3. What will be the refractive index of glass with respect to water
(a)1
(b)1.5
(c)1.125
(d)-10

Answer 1

9/8=1.125 is the answer

Answer 2

It will be the ratio

1.5/1.33

=(3/2)/(4/3)

=9/8