Question

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

The correct option is (C)

• concave lens forms the diminished image
• convex lens forms the magnifies image,
• Convex lens with smaller focal length results in higher magnification

Therefore, the convex lens with a focal length of 5cm leads to the highest magnification which can be used for reading