List of top Physics Questions on spherical lenses asked in WBJEE

A plano-convex lens fits exactly into a plano-concave lens. Their plane surfaces are parallel to each other. If lenses are made of different materials of refractive indices \( \mu_1 \) and \( \mu_2 \) and \( R \) is the radius of curvature of the curved surface of the lenses, then the focal length of the combination is

If$I_{1}$and$I_{2}$ be the sizes of real images for two positions of a convex lens between object and screen,then the size of the object is

The distance between an object and a divergent lens is $m$ times the focal length of the lens. The linear magnification produced by the lens is