Physics - Geometrical Optics Question with Solution | TestHub

Let the absolute refractive indices of air, water, and glass be $n_a$, $n_w$, and $n_g$ respectively.

Refractive index of water with respect to air is $x=\frac{n_w}{n_a}$

Refractive index of glass with respect to water is $y=\frac{n_g}{n_w}$

Refractive index of air with respect to glass is $z=\frac{n_a}{n_g}$

Multiplying the three equations, we get:

$xyz=\frac{n_w}{n_a}\times \frac{n_g}{n_w}\times \frac{n_a}{n_g}$

$xyz=1$

Answer: $xyz=1$