> I have difficulty in understanding or accepting the notion
> losses--...wasted power heating the earth, etc..."
> I have no problem with using a dc, ac, or rf resistance
meter to measure
> between two earth points, but radio waves striking the
earth, I dunno!
> What follows is what is puzzling; maybe someone can help
Well, anytime an EM wave is reflected or absorbed there are
charges moving in the media. The same is true for
time-varying electric and magnetic fields, not just EM
radiation. You don't need an electrical connection to earth
to make charges move.
When charges move in a lossy media it converts useful energy
into useless heat.
If that didn't happen, signals would be much stronger at
long distances and low antennas would be a whole lot more
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
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