A person can see clearly only the objects situated in the range 50 cm to 300cm. He went to an Optometist who prescribed him a lens of certain power to increase the maximum distance of his vision to infinity , i.e., it corrected the near-sightedness. However, upon using the prescribed lens the person discovered that the near point of his vision has shifted from 50 cm to a distance ìdî. What is the value of d ? urgent plzzz reply with correct answer
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25 CM
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