(a) What is short-sightedness ? State the two causes of short-sightedness (or myopia). With the help of ray diagram, show :
(i) the eye-defect short-sightedness.
(ii) correction of short-sightedness by using a lens.
(b) A person having short-sight cannot see objects clearly beyond a distance of 1.5 m. What would be the nature and power of the corrective lens to restore proper vision ?

Answer

(b) Concave lenses ; - 0.67 D

Explanation

NA