A thin walled glass container is filled with water $\left(\mathrm{\mu }=\frac{4}{3}\right)$. A point source $S$ is fixed inside water. A thin equiconvex lens ($\mu =1.5$) and concave mirror are arranged with mutual separation $\frac{\mathrm{R}}{2}$ as shown in figure.
The distance of lens from the plane surface of the container is also $\frac{\mathrm{R}}{2}$ for first (as shown in diagram) and $\frac{\mathrm{R}}{6}$ for second question of the stem (assume suitable change in diagram). Here R is radius of curvature of all curved surfaces. An observer is present at the position of $S$ itself. The distance of $S$ from A is $\mathrm{mR}$, and separation between final image seen by observer and observer himself is $\mathrm{nR}$.