A student sitting at the back of the classroom cannot read clearly the letters written on the blackboard. What advice will a doctor give to her? Draw ray diagram for the correction of this defect.
The student is suffering from myopia or short-sightedness. Because the parallel rays coming from longer distance will meet at a point before retina. So doctor will advise him to wear concave lens which will diverge the light rays and focus the rays on retina.
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