(b) a person is unable to see distinctly the objects closer than 1 m. Name the defect of vision he is suffering from. Draw ray diagrams to illustrate the cause of the defect and its correction by suitable lens.
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He is suffering from hyperopia...it can be corrected by using convex lens
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Explanation :
The person is not able to see distinctly the objects closer than 1 m. The person is suffering from hypermetropia in which the person cannot see nearby objects clearly but can see far objects normal.
This defect can be corrected by using a convex lens. It is shown in the attached figure.
Hence, this is the required solution.
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