Question

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. A concave lens of focal length 50 cm
• C. A convex lens of focal length 5 cm
• D. A concave lens of focal length 5 cm

Answer 1

The correct option is C A convex lens of focal length 5 cm

A convex lens of minimum focal length is used while reading small letters found in dictionary

therefore from given A convex lens of focal 5 cm is most suitable.

thus, Option C is correct,