The Elementary Principles of Wireless Telegraphy
The Elementary Principles of Wireless Telegraphy
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In our eReader you can find the full English version of the book. Read The Elementary Principles of Wireless Telegraphy Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book The Elementary Principles of Wireless Telegraphy
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It should be understood, though, that Hertz only demonstrated the existence of these waves, and did not in any way attempt to utilise them as a means of com- munication.
168. The advantages which electric waves have over light waves for communication can be briefly stated as follows : 169. (1) They will pass through, or over, intervening objects which are impervious to light waves, and therefore these objects will not interrupt communication.
170. (2) They will follow the curvature of the earth..., and therefore the range of communication can be in- creased beyond the limits of the horizon, whereas in the case of light waves it is necessary that the point from which a ray of light is being received is above the horizon.
PRODUCTION OF WAVES 171. We have already stated that waves formed on the surface of a body do not follow exactly the same laws as pressure waves, but the analogy of the wave produced on the surface of a pool is useful in explaining how a pressure wave is produced.
172. Let us first understand clearly what the differ- ence is between a wave produced on the surface of a body and a wave produced through the substance of a body.
What to read after The Elementary Principles of Wireless Telegraphy?
You can find similar books in the "Read Also" column, or choose other free books by R D Bangay to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
It should be understood, though, that Hertz only demonstrated the existence of these waves, and did not in any way attempt to utilise them as a means of com- munication.
168. The advantages which electric waves have over light waves for communication can be briefly stated as follows : 169. (1) They will pass through, or over, intervening objects which are impervious to light waves, and therefore these objects will not interrupt communication.
170. (2) They will follow the curvature of the earth..., and therefore the range of communication can be in- creased beyond the limits of the horizon, whereas in the case of light waves it is necessary that the point from which a ray of light is being received is above the horizon.
PRODUCTION OF WAVES 171. We have already stated that waves formed on the surface of a body do not follow exactly the same laws as pressure waves, but the analogy of the wave produced on the surface of a pool is useful in explaining how a pressure wave is produced.
172. Let us first understand clearly what the differ- ence is between a wave produced on the surface of a body and a wave produced through the substance of a body.
What to read after The Elementary Principles of Wireless Telegraphy?
You can find similar books in the "Read Also" column, or choose other free books by R D Bangay to read onlineMoreLess
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