question_answer 33)

  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.

Answer:

                  The student is suffering from myopia or near-sightedness. In myopia, one can see nearby objects clearly but cannot see distant objects distinctly. The doctor advices a concave lens of suitable power to bring the image back onto there tina. The ray diagram for the correction of this defect is shown below