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A person needs a lens of power - 4.5 D for correction of her vision.

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asked Jan 21, 2018 in Physics by Kundan kumar (49,132 points) ● 34 ● 381 ● 1018

A person needs a lens of power - 4.5 D for correction of her vision.
(a) What kind of defect in vision is she suffering from?
(b) What is the focal length of the corrective lens?
(c) What is the nature of the corrective lens?

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answered Jan 21, 2018 by Vikash Kumar (144,729 points) ● 8 ● 11 ● 21
selected Jan 21, 2018 by Kundan kumar
 
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(a) Myopia

(b) f=1/(-4.5)=-2/9m

=-0.22m

(c) Concave lens

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