Question

"Bhargavi" able to read the printed letters text book, but unable
to read the letters on the black-board for away from her.
(0) Which type of eye defect she is suffering from?
(ii) Which type of lens is used to correct the defect?
(iii) Derive the formula for focal length of that lens.


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Answer 1

Answer:

(O) she is suffering from myopia.

(ii) biconcave lens should be used to correct the defect

(iii) focal length can be given by formula 1/u + 1/v = 1/f.