An overhead projector must cast a real image of a transparency placed 0.40 m in front…
PHYSICS · Single correct · AP · Physics 2: Algebra-based · Geometric Optics · Geometric Optics
Problem
An overhead projector must cast a real image of a transparency placed 0.40 m in front of its projection lens onto a screen 2.0 m away on the other side of the lens. Approximately what focal length should the projector lens have?
(a) 40cm
(b) 50cm
(c) 33cm
(d) 30cm