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If the focal length of a magnifler is 5c...

If the focal length of a magnifler is 5cm calculate
a) the power of the lens
b) the magnifying power of the lens for relaxed and strained eye.

Text Solution

Verified by Experts

As power of a lens is reciprocal of focal length in
`P=1/((5xx10^(-2)m))=1/0.05` diopter=20D
b) For relaxed eye, MP is minimum and will be
`MP=D/f=25/5=5`
While for strained eye, MP is maximum and will be
`MP=1+ D/f=1+5=6`
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