The trichromatic (Young-Helmholtz) theory of color vision proposes
- A
Four types of cones sensitive to red, green, blue, and yellow
- Bcheck_circle
Three types of cones sensitive to red, green, and blue
- C
One cone type whose firing rate encodes all colors
- D
Two types of cones tuned to long and short wavelengths
Explanation
Different combinations of cone activity produce all perceived colors.