The object in a ray diagram is perpendicular to the principal axis but does not have one end lying on the principal axis. The minimum number of rays that must be drawn in this ray diagram in order to determine the position of the image is
A) 1.
B) 2.
C) 3.
D) 4.
E) 5.

Question

Quizplus · Accepted Answer

The minimum number of rays that must be drawn in this ray diagram in order to determine the position of the image is 3. One ray should be drawn parallel to the principal axis, one ray should be drawn through the center of curvature, and one ray should be drawn through the focal point.

The Object in a Ray Diagram Is Perpendicular to the Principal