EM Waves on Antennas

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EM Waves on Antennas

Post by LloydK on Sun May 28, 2017 12:29 pm

Accelerating Charges Emit Electromagnetic Waves - "Light" - Radio Antennas!

That video explains EM waves between antennas. So is it true that that's where electric and magnetic fields are actually detected? (I don't see how those waves could each be just two-dimensional.) Anyway, how would the fields be produced and how would radio photons be emitted by an antenna? I take it the length of the antenna determines the frequency of the radio photon that's emitted. True? How does the radio photon act as a carrier for other photons that produce variable sound waves that we hear as voices, music etc?

I'd like to link this to the discussion we had before about wifi, electricity etc, but I don't know if I'll have time to look those up.


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