Which One of the Following Statements Is True Concerning the Focal

Multiple Choice

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.