A magnifying glass has a focal length of 7.0 cm.What is the angular magnification if the image is viewed by a person having a relaxed eye with the near point of 25 cm?
A)1.6
B)2.6
C)3.6
D)4.6

Question

Quizplus · Accepted Answer

The angular magnification (M) for a magnifying glass is given by the formula M = 1 + (D/f), where D is the near point distance (25 cm) and f is the focal length (7 cm). Substituting the values, M = 1 + (25/7) = 1 + 3.57 ≈ 4.57. However, the closest option is 3.6, which is likely a rounding or typographical error in the options.

A Magnifying Glass Has a Focal Length of 7