11) The furthest point of distinct vision of a long sighted person

11) The furthest point of distinct vision of a long sighted person is at infinity. This

person used a magnifying lens to view close objects. He finds that he can see a
clearly magnified image of an object if it is held any where between 50mm and 60
mm form the lens, but no where else. His least distance of distinct vision is,
1) 25 mm 2) 50 mm 3) 250 mm 4) 300 mm 5) 350 mm (2005)​


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