Re: How many joules --> e.m. waves

[inet@intellisys.net (brian whatcott)]

At 10:58 AM 4/21/97 EDT, LUDWIK KOWALSKI wrote:
> ... the electrostatic energy is 15 microjoules. 
> If the "what happens to this electrostatic energy" question was answered 
> correctly then only 0.00056% of our 15 microjoules (that is only 84 nJ) 
> should be emitted.... another mechanism, competing with the magnetic dipole 
> radiation, must be at work here....
>                                                  Ludwik Kowalski
First the gotcha: 5.6 parts per million of 15 microjoules is 84 picojoules.

In the near field, the  induction competes with radiated (electromagnetic) 
field.
  This was the standard criticism of several early radio pioneers, including a
 music teacher on the east coast who in retrospect seems to have achieved 
highly noteworthy results in the 19th century.

At a distance of lambda/(2.pi) distance units from an antenna radiating at a
 wavelength of lambda distance units the magnitude of these two fields is
the same. By 16 wavelengths the induction has fallen to abt. 1% of radiation.

Regards
brian whatcott <inet@intellisys.net>
Altus OK