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

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+2 votes
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asked Jun 10, 2017 in Physics by Kundan kumar (49,132 points) ● 34 ● 439 ● 1384
(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?

1 Answer

+2 votes
answered Jun 10, 2017 by Vikash Kumar (144,729 points) ● 8 ● 11 ● 26
edited Jan 30, 2018 by faiz
 
Best answer

(a) Myopia

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

      =-0.22m

(c) Concave lens

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