In an experiment a convex lens of focal length 15 cm is

Last updated: 6/5/2023

In an experiment a convex lens of focal length 15 cm is placed coaxially on an optical bench in front of a convex mirror at a distance of 5 cm from it It is found that an object and its image coincide if the object is placed at a distance of 20 cm from the lens The focal length of the convex mirror is a 27 5 cm c 25 0cm b 20 0 cm d 30 5 cm