the far point of a myopic person is 80% 80cm in front of the eye what is the nature power of the lens required to correct the defect
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Explanation:
The person is suffering from myopia and hence need a concave lens to correct the defect. The lens should be such that an object at infinity must form its image at the far point.
Hence, F=−80 cm which is −0.8 m
The power of the lens can be obtained as:
P= 1/f
P= 1/(−0.8)
=−1.25 D
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