If you stare at the blue sky for a while and then look down at the sidewalk,the sidewalk may appear yellow.This phenomenon fits the:
A) color blindness theory.
B) opponent-process theory.
C) trichromatic theory.
D) color constancy theory.

Question

Quizplus · Accepted Answer

This phenomenon is explained by the opponent-process theory, which suggests that color perception is based on three opposing pairs of colors (red-green, blue-yellow, and black-white). Staring at the blue sky for a while causes the blue receptors in the eyes to tire, leading to an afterimage of yellow (the opposite of blue) when looking at the sidewalk.

If You Stare at the Blue Sky for a While