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![]() "Brian Howie" wrote ... In message , Dave writes "Szczepan Bialek" wrote in message ... It seems that at long distances should appear the phenomenon of frequency doubling. See: http://www.rp-photonics.com/frequency_doubling.html Is such? S* not that has been reported anywhere i have seen. this is likely because that at the low amplitudes of radio waves relative to the energies needed to create non-linear effects the medium is close enough to linear that any doubling effect is too small to see. You can get ionospheric mixing of radio waves. e.g Luxembourg Effect; so doubling is possible. You are right. I have found this: http://books.google.pl/books?id=QSke...P RA1-PA53,M1 There on the page 53 you can find that the medium-wave were disturbed by the long-vave (halve-way between). S* |
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