Wall, E. J. (Edward John), 1860-1928 · Boston, Mass., American Photographic Publishing Co. · leaf 23
THE SPECTRUM — COLOR FORMATION ii The action of the ' individual colors ought to be clear from Fig. 2, but we can deal with it in another way. Let A (Fig. 5) represent the spectrum reflected from a red pigment, and B that of a yellow pigment: then if these spectra are superimposed the only colors… … these is orange. In the formation of greens we have a similar case: let D represent the absorption of a blue pigment, and E that of a yellow, then, superimposing these, the only light common to both is the green shown in F. From what has been said it should be clear that we obtain our colors in the…
Color photography
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
