Physics - Geometrical Optics Question with Solution | TestHub

A small bulb is placed at the bottom of a tank containing water to a depth of$\sqrt{7} \mathrm{m}$. The refractive index of water is$\frac{4}{3}$. The area of the surface of water through which light from the bulb can emerge out is$x\pi {\mathrm{m}}^2$. The value of$x$is _____ .