Physics - Geometrical Optics Question with Solution | TestHub

A ray of light travelling in air is incident at angle of incident $30^{\circ }$ on one surface of slab in which refractive index varies with y. The light travels along the curve $\mathrm{y}=4{\mathrm{x}}^2$ (y and x are in metre) in the slab. Find out the value of $2\mu$, $\mu$ is the refractive index of the slab at $\mathrm{y}=1/2\mathrm{m}$ in the slab.