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  • A person cannot see distinctly at the distance less than one metre. Calculate the power of the lens that he should use to read a book at a distance of 25 cm. Give your answer in Dioptre<div cla

A person cannot see distinctly at the distance less than one metre. Calculate the power of the lens that he should use to read a book at a distance of 25 cm. Give your answer in Dioptre

Option: 1 3

Option: 2 0.125

Option: 3 -3

Option: 4 4

Answers (1)

best_answer

 

 

 

P=\frac{1}{f}=\frac{1}{v}-\frac{1}{u}

-\frac{1}{100}+\frac{1}{25}=\frac{3}{100}=+3 D

Posted by

avinash.dongre

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