Chapter 3. Mechanics of Light
Figure 3.1. Three Speedlites, one each gelled with pure red, pure green, and pure blue, are fired into the corner of my studio ceiling—as a demonstration of the additive primaries. At the center, you can see patches of cyan, magenta, and yellow—the subtractive primaries, which are created when red, green, and blue merge.
The Short Version
Light follows some pretty specific rules about how ...