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Hypermetropia & Its Cure

A person can ...

Question

A person can see the objects lying between 25 cm and 10 m from his eye. His vision can be corrected by using lens of power:

A

+ 10 D

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B

- 0.1 D

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C

+ 4 D

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D

- 0.25 D

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Solution

The correct option is B
- 0.1 D

His distance of distinct vision at 25 cm is normal. By using a concave lens of focal length 10 m he will be able to see distant objects.

P =1 /f

=1/ -10 m

=-0.1 D

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