Section bank C/P #52

I see their reasoning that since yellow is the color seen, purple must be absorbed.

However, the light chapter in TBR distinguishes between emitted colors and reflected colors, explaining that only reflected colors (IE, those seen from objects you can't see at night) follow this rule. Emitted colors (IE, those you can see at night, like light bulbs, TV screens) absorb and display the same color. How do you decide in this case whether this is an emitted or reflected color? Is it just because...

Section bank C/P #52