Question

u lu se ubjects at infinity and also
find focal length and power of the lens ? (Ans. Concave lens, - 10 m, -0.1 D]
A man can read a book kept at a distance of 25 cm by using spectacles. The power of
lens used in spectacles is - 2.0 D.
If he does not use spectacles, then at what distance will he keep the book to read
[Ans. 16.87 cm)
The near point for eye of a person suffering from hypermetropia is 0.50 m. Find the
nature, focal length and power of lens used in spectacles for removing this defect.
[Ans, Convex lens, 0.50 m, 2 D)
properly?​

Answer 1

Answer:

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