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Which of the following lenses would you prefer to use while reading smalllet tersfound in a dictionary?(a)A convex lensof focal length 50cm.(b)A concavelens of focal length50cm.(c)Aconvexlens of focal length 5cm.(d)Aconcavelens of focal length 5cm. |
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Answer» (C) A convex lens of focal length 5 REASON : A convex lens GIVES a magnified image of an OBJECT when it is placed between the radius of curvature and focal length. ALSO, magnification is more for convex lenses having shorter focal length.Therefore, for reading small letters, a convex lens of focal length 5 cm should be used.HOPE IT HELPS... |
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