(a) What is short-sightedness ? State the two causes of short-sightedness (or myopia). With the help of ray diagrams, 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 ?

(a) What is short-sightedness ? State the two causes of short-sightedn

1.	(a) What is short-sightedness ? State the two causes of short-sightedness (or myopia). With the help of ray diagrams, 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» (a) What is short-sightedness ? State the two causes of short-sightedness (or myopia). With the help of ray diagrams, 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 ?