Question

the refractive index of glass with respect to air is 1.65 and that of water with respect to air is 1.33 calculate the refractive index of water with respect to glass

Answer 1

$$\begin{gathered} \text{Given that ,} \\ {\text{refractive index of glass with respect to air is, n}}_{ga}=1.65=\frac{n_g}{n_a}\mathrm{....(1)} \\ {\mathrm{refractive\; index\; of\; water\; with\; respect\; to\; air\; is,\; n}}_{wa}=1.33=\frac{n_w}{n_a}.....\left(2\right) \\ {\text{refractive index of water with respect to glass is , n}}_{\text{wg}}\text{=}\frac{n_w}{n_g}\text{=}\frac{1.33}{1.65}\text{=0.806} \end{gathered}$$