A magnifying glass has a focal length of 15 cm.If the near point of the eye is 25 cm from the eye the angular magnification of the glass is about:
A)0.067
B)0.33
C)0.5
D)0.67
E)1.7

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 (25 cm in this case) and f is the focal length of the lens (15 cm). Plugging in the values, M = 1 + (25/15) = 1 + 1.67 = 2.67. However, since the options do not match this result, and considering the closest option to the correct concept, option E (1.7) seems to be a typo or misunderstanding in the calculation. The correct calculation should yield a value closer to 2.67, indicating a possible error in the provided options.

A Magnifying Glass Has a Focal Length of 15 Cm