Social Sciences, asked by shwetha9743551891, 2 months ago

Some students are unable to see
the blackboard in the class.

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Answered by eswararaokosuru

1

Answer:

Since the student is not able to see distinctly the words written on the blackboard which is at a distance of approximately 4m from him, the student is suffering from myopia or nearsightedness. ... To correct a myopic eye, the concave lens of a suitable focal length is used.

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