A convex lens forms a real image 16 mm long on a screen If

Last updated: 6/5/2023

A convex lens forms a real image 16 mm long on a screen If the lens is shifted to a new position without disturbing the object or the screen then again a real image of length 81 mm is formed The length of the object must be 1 48 5 mm 3 6 mm 2 36 mm 4 72 mm