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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)

Johnson, Frank G., 1835- · Chicago, A.H. Andrews · leaf 229

An illustration from 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, leaf 229
g violet, and the least refracted, R, being red.The index of refraction for any one color is uniform for any givenmedium, but the index in the same medium varies for the differentcolored light. ^0^. Figure 29.—Mirage.—^lirage is anatmospheric phenomenon,,caused by refraction andtotal reflection;… … FiG. 29.

Physics · Astronomy

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