For a thin converging lens of fixed focal length placed at rest in air
PHYSICS · Single correct · AP · Physics 2: Algebra-based · Geometric Optics · Geometric Optics
Problem
For a thin converging lens of fixed focal length placed at rest in air, an object initially produces a real image with a magnification magnitude ∣M∣ less than 1. Which of the following changes would most effectively increase the magnitude of the magnification produced by the lens?
(a) Increase the object–lens distance so it is exactly twice the focal length of the lens.
(b) Replace the lens with another of shorter focal length while keeping the object in the same position.
(c) Decrease the object–lens distance but keep it greater than the focal length.
(d) Move the object to a distance less than the focal length of the lens.