Well's natural philosophy : for the use of schools, academies and privte students, introducing the latest results of scientific discovery and research ; arranged with special reference to the practical application of physical science to the arts and the experiences of everyday life ; with three hundred and seventy-five engravings (1873)
Wells, David A · New York : Ivison, Blakeman, Taylor and Co. · leaf 341
336 WELLSS NATURAL PHILOSOPHY. How is the])rimary rain-bow formed! Fig. 271. … Fig. 272. The inner, or primary rainbow, wliicli is theone ordinarily seen, is formed by two refrac-tions of the solar ray, and one reflection, the ray of light entering the drops at the top, and being reflected to the eye from the bottom. Thus, in Fig. 271, the ray S A of the pri-mary rainbow…
Physics · Science · Technology
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