s through the whole face of the prism, and all the COLOR MIXTURE 25 light passes through the two lenses, this image will be uniform-ly white. Now, if an opaque obstacle be placed just in frontof L,, i. e., just in the plane in which the spectrum is formed,the obstacle being of sufficient width to… … Figure 13 By this means, we find thai the color complementary to theaverage spectral green is a peculiar shade of red, that com-plementary to spectral blue a sort of golden yellow, etc.Generally, one or both of a pair of complementary colors areimpure in the spectral sense. It is found that a…
Light
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