Question

the far point of a myopic person is 80cm Infront of eye what is the nature and power of lens required to correct the problem
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Answer 1

Answer:

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=−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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