The focal length of a converging lens is 10 cm. What is the magnification of this lens if the image is viewed by a relaxed eye with a near point of 25 cm?
A) 0.5
B) 1.5
C) 2.5
D) 3.5
E) 4.5

Question

Quizplus · Accepted Answer

The magnification of a lens when the image is viewed by a relaxed eye is given by the formula M = 1 + (D/f), where D is the near point distance (25 cm) and f is the focal length (10 cm). Substituting the values, M = 1 + (25/10) = 1 + 2.5 = 3.5.

The Focal Length of a Converging Lens Is 10 Cm