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 24
of incidence; angle NOR, angle of reflection; NO, normal or perpendicular to thereflecting surface. The inner side is a concave spherical mirror, and the outer side, aconvex spherical mirror. Ques. What is the focus of a curved mirror? Ans. A point where the reflected rays meet or tend to meetif… … Fig. Fig, 3,768.—Multi-image formed by two mirrors. When an object is placed between twoplane mirrors, which form an angle with each other, either right or acute, images of theobject are formed, the number of which increases with the inclination of the mirrors.If they be at right angles to each…
Electrical engineering
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