A person has a minimum distance of distinct vision as 50 cm. The power of lenses

A person has a minimum distance of distinct vision as 50 cm. The power of lenses required to read a book at a distance of 25 cm is

Options

(a) 3 D
(b) 1 D
(c) 2 D
(d) 4 D

Correct Answer:

2 D

Explanation:

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