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In a convex lens of focal length F, the minimum distance between an object and its real image must be

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In a convex lens of focal length F, the minimum distance between an object and its real image must be

(a) 3 F

(b) 4 F

(c)  3/2 F

(d)  2 F

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1 Answer

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Best answer

Correct option (b) 4 F

Explanation:

Let L is the distance between a real object and its real image formed by a convex lens, then as

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