Answer:
The answer to the question is as follows.
Mixing _lights_involve _adding up_the wavelengths in the mixture and the perceived color results from what is _added_. This is called __additive color mixture___ color mixture.
Step-by-step explanation:
Additive color mixing is the putting together two or more sets of different wavelengths of light to form light of a different wavelength hence a light of a different color. That is mixing primary light waves of different colors produces a secondary light wave of a different color by addition of the the wavelengths of the primary light wave.
On the other hand mixing of colorants of different colors produces a mixture of the colorants with a new color by subtracting wavelengths of light.