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A certain myopic person has a far point ...

A certain myopic person has a far point of 150 cm.
What power of a corrective lens must have to allow him to see distant objects clearly ?

Text Solution

Verified by Experts

Distance of the far point = x=150 cm
This defect can be corrected by using a concave lens of focal length (f) and
f = -X = - 150 cm = - 1.5 m
Power of the corrective lens `=P=(1)/(f("in m"))`
`P=(1)/(1.5) = -0.67D`
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