A concave mirror of focal length f is placed at a distance

Last updated: 6/2/2023

A concave mirror of focal length f is placed at a distance of d from a convex lens of focal length f A beam of light coming from infinity and falling on this convex lens concave mirror combination returns to infinity The distance d must equal 2 2f f 4 f f 1 2f f2 13 1 f27