A stamp collector used a magnifying glass with a focal length of 24.0 cm to observe his favorite stamp .The image of the stamp was located at his near point distance of 30.0 cm.What was the approximate angular magnification of the magnifying glass when the collector observed his stamp?
A)1.00
B)1.25
C)1.75
D)2.00
E)2.25

Question

Quizplus · Accepted Answer

The angular magnification (M) of a magnifying glass is given by the formula M = 1 + (D/f), where D is the near point distance of the observer (in this case, 30.0 cm) and f is the focal length of the magnifying glass (24.0 cm). Substituting the given values, M = 1 + (30.0 cm / 24.0 cm) = 1 + 1.25 = 2.25.

A Stamp Collector Used a Magnifying Glass with a Focal