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A person has near point at 100 cm. What power of lens is needed to read at 20 cm if he/she uses

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asked Mar 29, 2018 in Physics by Nisa (2,540 points) ● 1 ● 3

A person has near point at 100 cm. What power of lens is needed to read at 20 cm if he/she uses (a) contact lens, (b) spectacles having glasses 2.0 cm separated from the eyes?

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answered Mar 29, 2018 by rubby (7,550 points) ● 1 ● 3 ● 5
selected Apr 1, 2018 by Vikash Kumar
 
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The person has near point 100cm. It is needed to read at a distance of 20cm.

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