Physics - Geometrical Optics Question with Solution | TestHub

An object $2.4\mathrm{m}$ in front of a lens forms a sharp image on a film $12\mathrm{cm}$ behind the lens. A glass plate $1\mathrm{cm}$ thick, of refractive index $1.50$ is interposed between lens and film with its plane faces parallel to film. At what distance (from lens) should object be shifted to be in sharp focus on film?