Sandra stares for about 30 seconds at a green square.After 30 seconds,she looks at a white sheet of paper.What will she "see"?
A)a red square
B)a blue square
C)a yellow square
D)a green square

Question

Quizplus · Accepted Answer

This is an example of an afterimage effect. When you stare at a green square for a prolonged period, the photoreceptors in your eyes become desensitized to green. When you then look at a white surface, which contains all colors, the green receptors are less responsive, and you see the complementary color, which is red.

Sandra Stares for About 30 Seconds at a Green Square