If you stare at something green for a long time and then look at a white surface,you will perceive the color red.

Question

Quizplus · Accepted Answer

This is known as the "afterimage effect." When you stare at a single color for a long time, the cells in your eyes that respond to that color become fatigued. When you look away, the cells that respond to the opposite color (in this case, red) become more active, creating the perception of a red afterimage.

If You Stare at Something Green for a Long Time