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)
urse, instead of passing on, as to T; and insteadof being refracted to a single round point, on an intercepting screen,it will be diffused or spread out over a considerable space, from V to E,called the solar sjjectrum, in which will be seen all the colors of therainbow. This dispersion is owing to… … The property which a refractive medium possesses of decomposingand scattering solar liglit, is called its disjjersivepoiver. The dispersivepower of different substances varies. For example, the spectrum formedhy flint glass is nearly twice as long as that formed by crown glass. Primary colors.—If a…
Physics · Astronomy
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