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Least distance of distinct vision of a p...

Least distance of distinct vision of a person is observer as 35 cm. What lens is useful for him to see his surrondings clearly? Why ?

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The least distance of distinct vision is 35cm. This is more than the least distance of distinct vision of an ordinary person. Hence the persom is suffering from Hypermetropia. He has ot use double convex lens to see his surroundings clearly.
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