Q)
(chatquestion)...A luminous object is placed 20 cm from the
surface of a convex mirror and a plane mirror is
set so that the virtual images formed in the two
mirrors coincide. If the plane mirror is at a distance
of 15 cm from the object, then the focal length of
the convex mirror, is-
(2) 15 cm
(1) 10 cm
(4) 40 cm
(3) 20 cm
1 Answer
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