Additive Color Mixture/Synthesis

What is additive color mixture/synthesis?

(Additive color mixture/synthesis in French: synthèse additive mixing principle of superimposing light colors through the addition of their components to form a color shade with greater brightness; primary colors Red-orange, Green), Blue-violet; secondary colors R+G=Yellow, R+B=Magenta, G+B=Cyan; maximum possible mixing result with sufficiently bright equal components is white, which is created by the addition of the primary colors W=R+G+B or of the two respective complementary colors  W=R+C=G+M=B+Y; light colors are mixed for example with spotlights from light sources with colored filters placed in front of them, with light dots placed close to each other (monitor RGB pixels), but also with a rotating circle with different-colored surfaces; the spectral characteristics of the individual light colors cannot be inferred from the mixing result (Grassmann’s 3rd Law).