Randy spent agonizing hours in front of a green computer screen writing his term paper. At one point, he stopped staring at the screen and glanced upon a white wall. The wall temporarily seemed to have a square patch of

Question

Quizplus · Accepted Answer

This is an example of afterimage. After staring at a green screen for a long time, the color receptors in Randy's eyes became fatigued, causing them to fire less frequently. When he looked at the white wall, the receptors that were not fatigued fired more frequently, creating an afterimage of the opposite color. In this case, the afterimage was of the complementary color of green, which is red.

Randy Spent Agonizing Hours in Front of a Green Computer