Your near point is 25.0 cm,and you're using a 50-diopter lens as a simple magnifier.What magnification do you obtain?
A)12.5
B)2
C)50
D)10
E)15.6

Question

Quizplus · Accepted Answer

The magnification (M) of a simple magnifier is given by the formula M = 1 + (D/f), where D is the near point distance (25 cm) and f is the focal length of the lens. The focal length (f) is the inverse of the lens power in diopters, so f = 1/50 = 0.02 m = 2 cm. Therefore, M = 1 + (25/2) = 1 + 12.5 = 13.5. However, since the options provided do not include 13.5, the closest correct choice is 12.5.

Your near Point Is 25