2 A concave mirror of focal length fi is placed at a

Last updated: 6/10/2023

2 A concave mirror of focal length fi 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 7 2012 The distance d must equal a f f c 2f f mwcl b d f f 2f f