A magnifying lens with a focal length of 10 cm has what maximum magnification? (Assume the near point is 25 cm).
A) 1.4
B) 3
C) 11
D) 4
E) 10

Question

A magnifying lens with a focal length of 10 cm has what maximum magnification? (Assume the near point is 25 cm).
A) 1.4
B) 3
C) 11
D) 4
E) ​10

Quizplus · Accepted Answer

The maximum magnification (M) of a magnifying lens 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, which rounds to 4.

A Magnifying Lens with a Focal Length of 10 Cm