Principles of Radiotelegraphy: Prepared in the Extension Division of the University of Wisconsin (Classic Reprint) - Tapa dura

Sinopsis

Excerpt from Principles of Radiotelegraphy: Prepared in the Extension Division of the University of Wisconsin

The transmission Of messages by radio signals is to many a mysterious process. The mystery, however, is not inherent in the transmission Of intelligence by. Ether waves for almost every light-house is a radio transmitter which sends out signals by long and short groups Of waves, and by waves Of different lengths, that is, white and colored light. This is never considered mysterious for the simple reason that nature has furnished man with a sense organ by means Of which these light waves are detected. If human beings were blind, like the fish Of Mammoth Cave, the detection of light Signals would become a very difficult and mys tarions process. NO light signals could be detected unless some means were devised for translating or converting light phenomena into phenomena capable Of detection by some one Of the other senses.

The mystery and difficulty Of radio communication is primarily due to the fact that nature has not provided man with a sense organ which is capable of detecting electromagnetic waves im mediately, but these waves must first be translated into other phenomena. It is undoubtedly true that space is filled with phenomena Of which we are wholly unconscious, or in other words to which we are totally blind. This was true Of electromagnetic waves until means Of detecting these waves were devised. In reality they are no more mysterious than light.

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