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A person cannot see objects beyond 80 cm from his eye while a person with normal eyesight can see object easily

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asked Jan 21, 2018 in Physics by Kundan kumar (49,132 points) ● 34 ● 384 ● 1027

A person cannot see objects beyond 80 cm from his eye while a person with normal eyesight can see object easily placed upto 160 cm from the eye. Find the nature, the focal length and the power of the correcting 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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The defect of vision is myopia.

A concave lens of focal length 4 m should be used.​

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