NCERT

Class 10

Science

Solutions

The far point of a myopic person is 80 cm in front of the eye. What is the nature and power of the lens required to correct the problem?

Power of lens = 1/f

∴ f = -80 cm

P = 1/f

P = -100/80

P = -5/4

P = -1.25 D

For correction of the defect, the lens should be concave, because power is negative.

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