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Article #21234

Re: wireless electricity

#21234
From: Rick Francis Golembiewski
Date: Wed, 26 Apr 1989 15:17
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Yes, you could broad cast energy in a similar mannor to radio waves (remember
that radio waves are a form of energy too, so it already being done in a
sense), HOWEVER you are NOT going to see power lines disappear, this is because
it is increadibly inefficient because the power would be transmitted in a
sphereical wave (assuming that you wanted to transmit power to everyone), you
run into a distance dependance, ie the farther you are from the transmitting
source the weaker the power transmitted it. (I believe the amplitude is
dependant on 1/r^2, however I'm not certain).  In any case, ever wondered why
you have to have to amplify a radio signal when the radio stations use far
far far more power then you ever would need to run your radio?  It's because
by the time the signal gets to you, there isn't all that much power left.
In any case electrical lines are lots more efficient, since you only send
power where it needs to go, and of course the electric company can meter
it too :-)...
//     Rick Golembiewski  rg20+@andrew.cmu.edu  \\
\\       #include stddisclaimer.h               //
 \\  "I never respected a man who could spell" //
  \\               -M. Twain                  //
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From: rg20+@andrew.cmu.edu (Rick Francis Golembiewski)
Newsgroups: sci.electronics
Subject: Re: wireless electricity
Message-ID: <gYJRpyy00WB-E57Uwj@andrew.cmu.edu>
Date: 26 Apr 89 15:17:18 GMT
Organization: Class of '92, Carnegie Mellon, Pittsburgh, PA
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