Which principal ray in a standard ray diagram for a thin lens travels in a straight…
PHYSICS · Single correct · AP · Physics 2: Algebra-based · Geometric Optics · Geometric Optics
Problem
Which principal ray in a standard ray diagram for a thin lens travels in a straight line through the lens without bending?
(a) A ray that passes through the near focal point and then continues straight through the lens.
(b) A ray that is initially parallel to the principal axis and therefore continues straight through the lens without bending.
(c) A ray that passes through the center of the lens and continues in the same direction.
(d) A ray that strikes the lens halfway between the axis and the edge, where the curvature is minimal, so it keeps the same direction.