A point source is to be used with a concave mirror to produce a beam of parallel light.The source should be placed:
A)as close to the mirror as possible
B)at the center of curvature
C)midway between the center of curvature and the focal point
D)midway between the center of curvature and the mirror
E)midway between the focal point and the mirror

Question

Quizplus · Accepted Answer

In order to produce a beam of parallel light rays, the point source must be placed at the focal point of the concave mirror. However, since it is difficult to locate the exact location of the focal point, the next best option is to place the point source halfway between the center of curvature and the mirror. This will allow the light rays to reflect off the mirror and converge at the focal point, producing a beam of parallel light. Therefore, choice D is the best option.

A Point Source Is to Be Used with a Concave