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Poll

To form an erect image twice the size of an object by using a convex lens of focal length 20cm the object should be placed at a distance ‘d’ from the optical centre of lens.Here’d’ is

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Poll Results

53.33%(a) d<20cm ( 8 voters )
6.67%(b) d=20cm ( 1 voter )
20%(c) d>20cm ( 3 voters )
20%(d) d=40cm ( 3 voters )
Based On 15 Votes

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