A luminous object is placed at a distance of `30 cm` from the convex lens of focal length `
Channel: Doubtnut
Date: 2020-08-02

A luminous object is placed at a distance of `30 cm` from the convex lens of focal length `20 cm`. On the other side of the lens, at what distance from the lens a convex mirror of radius of curvature `10 cm` be placed in order to have an upright image of the object coincident with it ?