Question

The refractive index of glass with respect with air is 3/2 and the refractive index of water to air is 4/3. The refractive index of glass with respect to water will be
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Answer 1

Refractive index of water wrt air (water n air)= 4/3

Refractive index of glass wrt air (glass n air) = 3/2

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.

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