Which of the following lenses would you prefer to use while reading small letters found in a dictionary?
(a) A convex lens of focal length 50 cm.
(b)concave lens of focal length 50 cm.
(c) A convex lens of focal length 5 cm.
(d) Aconcave lens of focal length 5 cm.
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A-A convex lens of focal length 50cm
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