A long cylindrical tube containing water in closed by an equinvex lens of local lengt
Channel: Doubtnut
Date: 2020-06-28

A long cylindrical tube containing water in closed by an equinvex lens of local length 10 cm in air. A point source is placed along the axis of the tube outside it at a distance of 21 cm from the lens. Locate the final image of the source. Refractive index of the materials of the lens `=1.5 and that of water =1.33.`