Physics - Geometrical Optics Question with Solution | TestHub

Consider two cases: (1) $H\le h_1$ and (2) $h_1\le H\le h$.

A small source of light is mounted inside a cylindrical container of height h . The bottom of the container is covered with a mirror. Initially, the container is empty. Then a clear liquid with the index of refraction n is slowly poured into the container. The level of liquid H rises steadily, reaching the top of the container in time T. Let ${\mathrm{h}}_1$ be the distance of source of the light from the bottom of the container. Consider paraxial ray approximation. The observer is vertically above the source in air and he is observing image after reflection.