If you stare for 30 seconds at a red object and then look at a blank sheet of white paper,you will see a greenish image of the object.This phenomenon best supports the:

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Quizplus · Accepted Answer

The opponent-process theory of color vision states that there are three pairs of color receptors in the visual system, with each pair working in opposition to the other (red-green, blue-yellow, and black-white). Staring at a red object for 30 seconds overstimulates the red receptors, causing them to fatigue. When we look at a blank sheet of white paper, the fatigued red receptors cannot fire as strongly as the green receptors, which are still sensitive. This creates a greenish afterimage, demonstrating the opponent-process theory.

If You Stare for 30 Seconds at a Red Object