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A farsighted person cannot see objects placed closer to 50 cm. Find the power of the lens needed to see the objects at 20 cm.

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

A farsighted person cannot see objects placed closer to 50 cm. Find the power of the lens needed to see the objects at 20 cm.

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answered Mar 29, 2018 by rubby (7,550 points) ● 1 ● 3 ● 5
selected Apr 1, 2018 by Vikash Kumar
 
Best answer

For the far sighted person,

So, power of the lens =1/f
= 3 Diopter

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