In general principle the ripples made by waves or by a stone thrown into water are the same as the radio waves. This illustration shows the similarity.
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https://paperspast.natlib.govt.nz/periodicals/RADREC19301114.2.27.1
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Radio Record, Volume IV, Issue 18, 14 November 1930, Page 9
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27In general principle the ripples made by waves or by a stone thrown into water are the same as the radio waves. This illustration shows the similarity. Radio Record, Volume IV, Issue 18, 14 November 1930, Page 9
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