If a man of normal color vision looks at a green paper for about 30 seconds and then shifts his gaze to a sheet of white paper, that paper will appear
A)yellow.
B)blue.
C)red.
D)gray.

Question

Quizplus · Accepted Answer

This phenomenon is known as an afterimage effect. When the man looks at the green paper, the green photoreceptors in his eyes become fatigued. When he then looks at a white surface, which contains all colors, the fatigued green receptors respond less, and the complementary color, red, becomes more prominent, making the white paper appear red.

If a Man of Normal Color Vision Looks at a Green