If you stare for 30 seconds at a red object and then look at a blank sheet of white paper, you will see a greenish image of the object. This phenomenon BEST supports ________ theory of color vision.
A) the Grieco trichromatic
B) the opponent-process
C) the Helmholtz trichromatic
D) Hering's vibration

Question

If you stare for 30 seconds at a red object and then look at a blank sheet of white paper, you will see a greenish image of the object. This phenomenon BEST supports ________ theory of color vision.
A) the Grieco trichromatic
B) the opponent-process 
C) the Helmholtz trichromatic 
D) Hering's vibration

Quizplus · Accepted Answer

The opponent-process theory of color vision proposes that color perception is controlled by opposing processes in the brain, such as red-green and blue-yellow. This phenomenon of seeing a greenish image after staring at a red object is an example of the opponent-process in action, as the red and green colors are perceived as opposites. The other theories of color vision (Grieco trichromatic, Helmholtz trichromatic, and Hering's vibration) cannot fully explain this phenomenon.

If You Stare for 30 Seconds at a Red Object