system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: In real life we can create a green paint from the combination of blue and yellow paints. Then why is it different in the electronic world where green is considered the primary colour, and yellow is the combination of blue and green?
gpt
You are comparing pigmentation with light. They are different. Pigments filter light out (absorb it instead of bouncing it off). When you mix all primary pigments, you get black because they are filtering out all colors of light. When you mix light, you are adding lights to each other. When you mix all the primary light colors, you get white.