According to the Trichromatic (Young-Helmholtz) Theory, We Perceive Color by

Multiple Choice

According to the trichromatic (Young-Helmholtz) theory, we perceive color by

A) the relative levels of activity by three types of cones.
B) different velocities of impulses by each receptor in the retina.
C) different frequencies of impulses by each receptor in the retina.
D) a red-green system and a yellow-blue system.