Johnson's natural philosophy and key to philosophical charts : illustrated with 500 cuts; being reduced photographic copies of all the diagrams contained in the author's philosophical series of indestructible school charts ; for the use of schools and families (1878)
by means of thedouble convex lens, L, they be converged so as to meet on the screen S,they will form green. By the same process it is found that yellow and red form orange;red and blue form violet and indigo. Still, no two colors alone make athird color in the solar spectrum, as more or less of all… … lengths of the several colors of the spectrum. The three curves, R, Y,and B, represent, respectively, the distribution, along the spectrum, of OPTICS. 241 the three primary colors, red, yellow, and blue, and the relative amountof each of these necessary to produce the secondary colors of the…
Physics · Astronomy
Internet Archive · University of Connecticut Library · Public Domain Mark 1.0. Free to use for anything.
