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A person can see clearly only upto a dis...

A person can see clearly only upto a distance of `25 cm`. He wants to read a book placed at a distance of `50cm`. What kind of lens does he require for his spectacles and what must be its power ?

A

–1.0 D

B

–1.33 D

C

–1.67 D

D

–2.0 D

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