A student complains that he is not able to read the teacher 's writing on the black board while sitting in the last row. What eye defect is the student is suffering from? How can it be corrected?
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He is suffering from myopia disease because due to the excessive curvature of the eye lens ,decrease in focal length of eye lens and due elongation of eyeball.
It can be corrected by using a concave lens of suitable power.
It can be corrected by using a concave lens of suitable power.
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Answer:
The student is suffering from myopia or short-sightedness. The defect can be corrected by the use of concave (diverging ) lens of an appropriate power.
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