Geometrical OpticsHard
Question
A thin convex lens of focal length ′f′ is put on a plane mirror as shown in the figure. When an object is kept at a distance ′′a′ from the lens - mirror combination, its image is formed at a distance a/3 in front of the combination. The value of ′′a′ is :
Options
A.3f
B.3/2 f
C.f
D.2f
Solution
Lens :
Mirror : Forms image at equal distance from mirror
lens :
a = 2f
Option(4)
Mirror : Forms image at equal distance from mirror
lens :
a = 2f
Option(4)
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