SSC
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A CONCAVE LENS OF SUITABLE FOCAL LENGTH IS USED FOR CORRECTING A:
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MYOPIC EYE
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HYPERMETROPIC EYE
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BOTH A & B
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NEITHER A & B
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Explanation:
Detailed explanation-1: -Myopia can be corrected by using a concave lens of suitable focal length. Concave lens used diverges the rays of light entering the eye from infinity. Hence, it makes the rays of light appear to come from the far point of the myopic eye.
Detailed explanation-2: -The problem of myopia is corrected by using convex lens of suitable focal length. The dispersive powers of the materials of convex lens and concave lens placed in contact are in the ratio 1 : 2. For the achromatic combination, we take convex lens of focal length 100 cm.
Detailed explanation-3: -Myopic eye defect can be corrected by using convex lens.
There is 1 question to complete.