Which one of the following statements is true concerning the focal length of a lens?
A)The focal length is the same for all colors.
B)The focal length is different for different colors because of reflection.
C)The focal length is different for different colors because of dispersion.
D)The focal length is different for different colors because of polarization.
E)The focal length is different for different colors because of spherical aberration.

Question

Quizplus · Accepted Answer

The focal length of a lens is different for different colors because of dispersion. This is known as chromatic aberration, where different colors of light refract at different angles as they pass through the lens, causing them to come to different focal points.

Which One of the Following Statements Is True Concerning the Focal