A dictionary of electrical words, terms and phrases (1898)
Houston, Edwin J. (Edwin James), 1847-1914 · New York, The W. J. Johnston company · leaf 325
CFig. 342. Equal and Opposite Refracting Angles. bination of a double convex lens of flint glass anda concave lens of crown glass. The ray of light entering the prism ABC,Fig. 342, suffers dispersion (separation into pris-matic colors). This dispersion in the samfB D … A C Fig. 343. Principle of Achromatism, medium is proportional to the angle g, betweenthe incident and emergent faces, called the re-fracting angle. If, now, another prism B C D, of the same ma-terial, with a refracting angle g, equal to g, iscombined with the first prism in the mannershown in Fig.…
Electricity · Electrical engineering
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