Hawkins electrical guide ... : questions, answers & illustrations : a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications ; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833-1928 · New York : T. Audel & Co. · leaf 26
773. If the incident ray be perpendicular to the surface separating the twomedia, it is not bent, but continues its course in a right line. 2,680 HAWKINS ELECTRICITY According as the refracted ray approaches or deviates from thenormal, the second medium is said to be more or less refringent,…
Electrical engineering
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