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Elements of radio telephony (1922)

Ballard, William Cyrus, Jr · New York [etc.] McGraw-Hill company, inc. · leaf 138

An illustration from Elements of radio telephony, 1922, leaf 138
RANSMISSION 111 upwards. Radio waves being of exactly the same nature aslight waves are reflected by conducting layers just as a mir-ror reflects light waves. We do not know what composesthe reflecting layer but believe that it may be composedof dust or moisture-laden particles. If the distance… … Fig. 49.—Diagram showing how fading phenomena may be producedby reflection from conducting layers above the earth. then a negative wave would have been received at B whilea positive wave was being radiated from A, or vice versa. If the total effective distance measured from A to R andback down to B…

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