Rood

Definition and stakes

Ogden Nicholas Rood,  Popular Science Monthly (1879)

“ The rose-red ghost which is thus developed has a color which is complementary to that which called it into existence, and this will also be the case if we employ little squares of other colors: red will give rise to a greenish-blue image, blue to a yellow, violet to a greenish-yellow, etc., the color of the image being always complementary to that which gave rise to it. ”
Source: Wikisource

Ogden Nicholas Rood,  Popular Science Monthly (1879)

“ Now, as the red nerves begin to be fatigued, the action of the other two sets will be relatively more powerful than at first, so that gradually the sensations of green and violet begin to add themselves to that of red, or, what is the same thing, the sensation of white mingles itself with that of red and makes the red color of the paper look a little grayish. The success of the experiment with the pure colors of the spectrum, which contain no white, is easily accounted for by the explanation just given. ”
Source: Wikisource

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