a person wants to read a book placed at 20 CM whereas near point of his eye is 30 cm calculate the focal length and types of lens
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F= uv/(u-v) = (-20)×(-30)/(-20+30)
= +60cm
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Answer:
In actual the near point of human eye is 25cm.
Explanation:
focal length of eye is half of 30cm that is 15cm.
They may be suffer from hypermetropia and lens used by them is concave.
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