Geometrical OpticsHard
Question
A concave mirror of focal length f1 is placed at a distance of d from a convex lens of focal length f2. Abeam of light coming from infinity and falling on this convex lens-concave mirror combination returns toinfinity. The distance ′d′ must equal
Options
A.- 2 f1 + f2
B.f1 + f2
C.- f1 + f2
D.2 f1 + f2
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