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Question
In a convex lens of focal length F, the minimum distance between an object and it's real image must be?
a) 3F b) 4F c) 3/2F d) 2F
In a convex lens of focal length F, the minimum distance between an object and it's real image must be?
a) 3F b) 4F c) 3/2F d) 2F
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Solution
The minimum distance occurs when object is kept at COC and corresponding image gets formed at the other COC
Distance between object and real image = 2R = 4f
Distance between object and real image = 2R = 4f
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