AP PSYCHOLOGY

Detailed explanation-1: -The trichromatic theory of color vision says that human eyes only perceive three colors of light: red, blue, and green. The wavelengths of these three colors can be combined to create every color on the visible light spectrum. This theory was first suggested by Thomas Young and later tested by Hermann Von Helmholtz.

Detailed explanation-2: -Young-Helmholtz theory-the theory that the retina contains three different color receptors-one most sensitive to red, one to green, one to blue-which when stimulated in combination, can produce the perception of any color.

Detailed explanation-3: -The trichromatic theory, which derives from the combined works of the 19th-century scientists Young and Helmholtz, says that there are three different cone systems in the eye that perceive three types of color: blue, green and red.

Detailed explanation-4: -Hermann von Helmholtz developed the theory further in 1850: that the three types of cone photoreceptors could be classified as short-preferring (violet), middle-preferring (green), and long-preferring (red), according to their response to the wavelengths of light striking the retina.

Detailed explanation-5: -Helmholtz famously viewed perception as “unconscious inference”-symbols or representations of the physical world that can be interpreted and disambiguated through converging evidence from different senses. The most important claim was, perhaps, that many of these inferences are learned rather than innate.