Question

The refractive index of water and glass with respect to air is $1.3$ and $1.5$ respectively then the refractive index of glass with respect to water will be:

• A. $ \frac{2.6}{1.5} $
• B. $ \frac{1.5}{2.6} $
• C. $ \frac{1.5}{1.3} $
• D. $ \frac{1.3}{1.5} $

Answer 1

Answer: (C)

Here : Refractive index of water with respect to air $=1.3$
Refractive index of glass w.r.t. air $=1.5$
From the formula the refractive index of glass with respect to water is grating
$=\frac{\text { Refractive index of glass w.r.t. air }}{\text { Refractive index of water w.r.t. air }}$
$=\frac{1.5}{1.3}$