Imagine wandering into an auditorium where a lecturer is talking about the negative afterimage. The audience is looking at a blank white screen, but when they are asked what they see, they respond that they see the red, white, and blue American flag. Obviously, they have previously been staring at a ________ flag.

Question

Quizplus · Accepted Answer

The green, black, and yellow flag gives the audience a negative afterimage that is the opposite of the original colors. When we stare at any color long enough to partially fatigue our photoreceptors, looking at a white surface allows us to see the complements of the original colors.

Imagine Wandering into an Auditorium Where a Lecturer Is Talking