student and able to see the word written on the blackboard placed at a distance of 3 cm from him calculate the power of
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As the student is unable to see clearly the words written on the blackboard at a distance of 4 m, the student is suffering from myopia or near-sightedness. This defect is corrected with concave lens of suitable focal length is used. The image is allowed to form at the retina by using a concave lens of suitable power. Ray diagrams for the
(i) defect of vision and
(ii) for its correction:
(a)
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