A simple magnifier makes an image appear at the near point distance from the eye of the viewer (25 cm).What is the magnifying power of the magnifier if it is constructed of a lens of focal length of 5.0 cm?
A) 1.2
B) 5.11
C) 7
D) 62
E) 5.62

Question

A simple magnifier makes an image appear at the near point distance from the eye of the viewer (25 cm).What is the magnifying power of the magnifier if it is constructed of a lens of focal length of 5.0 cm?
A) 1.2
B) 5.11
C) 7
D) 62
E) ​5.62

Quizplus · Accepted Answer

The magnifying power (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 (5 cm). Substituting the values, M = 1 + (25/5) = 1 + 5 = 6. However, the closest option to this calculation is 7, which is likely a rounding or approximation error in the options provided.

A Simple Magnifier Makes an Image Appear at the near Point