Question

which of the following lenses would you prefer while reading small letters found in a small dictionary
options:-a.a convex lens of focal length 50 cm,b.a concave lens of focal length 50 cm,c.convex lens of focal length 5 cm,d.a concave length of focal length 5 cm
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Answer 1

Answer: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

Explanation:Hope this helps you.

Answer 2

OPTION C

(c) A convex lens of focal length 5 cm can be used while reading small letters found in a dictionary