A physics student desires to create a beam of light that consists of parallel rays.Which one of the following arrangements would allow her to accomplish this task?
A)A light bulb is placed at the focal point of a convex mirror.
B)A light bulb is placed at the focal point of a diverging lens.
C)A light bulb is placed at the focal point of a converging lens.
D)A light bulb is located at twice the focal length from a concave mirror.
E)A light bulb is located at twice the focal length from a converging lens.

Question

Quizplus · Accepted Answer

When a light source is placed at the focal point of a converging lens, the rays of light exiting the lens are parallel. This is because the lens refracts the rays such that they travel parallel to the principal axis after passing through the lens.

A Physics Student Desires to Create a Beam of Light