The near point of a long-sighted person is 50 cm from the eye.
(a) Can she see dearly an object at:

(i) a distance of 20 cm ? (ii) at infinity ?

(b) To read a book held at a distance of 25 cm, will she need converging or diverging spectacle lenses?

Question

Philoid · Accepted Answer

(a) (i) The near point of a long-sighted person is 50 cm from the eye so he cannot see clearly an object at a distance of 20cm.

(ii) The near point of a long-sighted person is 50 cm from the eye so he cannot see clearly an object at infinity.

(b) To read a book held at a distance of 25 cm, she will need converging spectacle lens.

The near point of a long-sighted person is 50 cm from the eye.(a) Can she see dearly an object at:(i) a distance of 20 cm ? (ii) at infinity ?(b) To read a book held at a distance of 25 cm, will she need converging or diverging spectacle lenses?