Physics - Geometrical Optics Question with Solution | TestHub

A concave mirror has radius of curvature of$40\mathrm{ }\mathrm{c}\mathrm{m}.$It is at the bottom of a glass that has water filled up to$5\mathrm{ }\mathrm{c}\mathrm{m}$(see figure). If a small particle is floating on the surface of water, its image as seen, from directly above the glass, is at a distance$\mathrm{d}$from the surface of water. The value of$\mathrm{d}$is close to: (Refractive index of water$=1.33)$