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 sitting at the back of the classroom cannot read clearly the letters written on the blackboard, it means that the student is suffering from Myopia. The doctor will suggest her, a concave lens of suitable power which will bring the image back on retina and therefore the defect will be corrected.
Ray diagram for the correction of this defect is as follows:
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