Which of the following lenses would you prefer to use while reading small letters found in a dictionary
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 50cm
(b) A concave lens of focal length 50cm
(c) A convex lens of focal length 5cm
(d) A concave lens of focal length 5cm
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Magnifier or a simple microscope consists of a convex lens of small focal length; choice (r) is correct.
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