a person is not able to read from a book until he keeps it at 50 cm determine the power of corrective lens
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The corrective lens should have focal length 50 cm = 0.5 m.
Thus, power of lens = 1/0.5 = 2 D
The person is suffering from hypermetropia.
In hypermetropia, the near point of the eye shifts from 25 cm to some greater distance.
A convex corrective lens is used to remedy this problem.
Thus, power of lens = 1/0.5 = 2 D
The person is suffering from hypermetropia.
In hypermetropia, the near point of the eye shifts from 25 cm to some greater distance.
A convex corrective lens is used to remedy this problem.
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