Physics - Geometrical Optics Question with Solution | TestHub

A thin convex lens is placed just above an empty vessel of depth $80\mathrm{cm}$. The image of a coin kept at the bottom of the vessel is thus formed $20\mathrm{cm}$ above the lens. If now water is poured in the vessel up to a height of $64\mathrm{cm}$, what will be the approximate new position of the image. Assume that refractive index of water is $4/3$.