According to the opponent-process theory, if you stare at a red star for awhile (e.g., 60 seconds) and then look at a plain sheet of white paper you will see an afterimage of the star in which hue?
A) yellow
B) blue
C) green
D) red
E) purple

Question

Quizplus · Accepted Answer

The opponent-process theory suggests that colors are perceived through the opposition of color pairs: red-green, blue-yellow, and black-white. Staring at a red object for a prolonged period fatigues the red receptors, leading to the dominance of the green receptors when looking away, hence a green afterimage.

According to the Opponent-Process Theory, If You Stare at a Red