Elementary natural philosophy : designed for high schools and academies (1881)
Griffin, La Roy F. (La Roy Freese), 1844-1916 · Philadelphia : Sower, Potts & Co. · leaf 225
hows the path ofthe rays which produce it.Coming from the sun, theyare all parallel, and uponescaping, only one ray fromeach drop can reach the eye.The ray enters the drop atthe upper part, and is refrac-ted towards the perpendicu-lar, or downward. It thenFig. 252. traverses the drop, and is… … 735. The Secondary Bow is above the primary, showsthe colors in reverse order, and is less brilliant. The light which forms this bow enters thelower part of the drop A, Fig. 253, is refractedupward to B, is then reflected to D, and thenceto F, where it emerges. Hence the light under-goes two…
Physics
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