More than a century ago, researchers had evidence that the human retina contained three kinds of color-sensitive receptors. What was the basis of their evidence?

Question

Quizplus · Accepted Answer

The researchers' evidence was based on experiments involving the mixing of colors of light together. They found that by combining three primary colors – red, green, and blue – they could create all other colors humans see. This provided evidence that the human retina contains three kinds of color-sensitive receptors, each sensitive to different wavelengths of light.

More Than a Century Ago, Researchers Had Evidence That the Human