Biology / Unit 12 Bio 2911 short lesson, about 20 seconds
Trichromatic Color Coding
Captions available
The idea
Human color vision uses three cone types tuned to short, medium, and long wavelengths; perceived color emerges from the relative activity ratio across all three, not any one cone alone.
In practice
Equal stimulation of all three cone types is perceived as white light.
Where people slip
A two-cone, dichromatic system is possible but limits the range of distinguishable colors compared with the human trichromatic system.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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