How come red & purple are on opposite, far ends of the electromagnetic spectrum, but when mixing colors together in kindergarten, purple is halfway between red & blue?

Question

Shouldn’t common sense dictate that either both be one, or both be the other?

In: 1934

Answer 1

The color wheel is a circle. The spectrum is a line. To fit the circle to a line, it has to cut somewhere. Purple is where that cut happens.