The trichromatic receptor theory explains how different color receptors in the eye combine to produce color vision. However, this theory does NOT explain:

A) negative afterimages.
B) how color receptors respond differently to different colors.
C) how many color receptors the retina must utilize in order to produce color vision.
D) color vision.

The trichromatic receptor theory explains how color vision is produced by the combination of activities in three types of color receptors in the eye. However, it does not adequately explain negative afterimages, which are better accounted for by the opponent-process theory. This theory suggests that color perception is controlled by the activity of two opponent systems: a blue-yellow mechanism and a red-green mechanism. When one color in a pair is suppressed, the other is enhanced, leading to the perception of negative afterimages.