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 28
index of refraction for a given substance is a constantquantity whatever be the angle of incidence; 2,682 HAWKINS ELECTRICITY 3. The refracted ray lies in the plane of the incident ray andthe normal; 4. Light rays are bent toward the normal when they enter amore refractive medium, and from the… … CRITICAL ANGLE. Fig.—3,775.—Diagram illustrating the critical angle or that angle between the incident ray andthe perpendicular drawn to the surface in the medium of smaller velocity at the point at whichtotal reflection begins to occur; the diagram is explained in the accompanying text, and…
Electrical engineering
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