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 184
f their waves. Ques. How do the wave lengths of different forms ofradiant energy emitted by ordinary matter vary? Ans. From less than fe^eio of an inch to ^ but longer WIRELESS TELEGRAPHY 2,275 waves varying from an appreciable fraction of an inch such asjj of an inch to many hundreds of feet may… … 5ATTERY Fig. 3,107.—Electric wave method of wireless telegraphy. The theory upon which this isbased assumes, that where one terminal of the oscillator system is grounded and theopposite terminal elevated as shown, the electric waves remain spherical and are propa-gated in a straight line until they…
Electrical engineering
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