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CBSE Class 10 Science Question 6 of 31

Light - Reflection and Refraction — Question 6

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Question 6

Which of the following lenses would you prefer to use while reading small letters found in a dictionary?

  1. A convex lens of focal length 50 cm
  2. A concave lens of focal length 50 cm
  3. A convex lens of focal length 5 cm
  4. A concave lens of focal length 5 cm
Answer

A convex lens of focal length 5 cm

Reason — A convex lens gives a magnified image and shorter the focal length, more is the magnification, hence, a convex lens of focal length 5 cm will be preferred.