Re: Physics of Wireless Transmission

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Original poster: "Bob (R.A.) Jones" <a1accounting@xxxxxxxxxxxxx>

Hi Dave,

> Original poster: "David Thomson" <dwt@xxxxxxxxxxxx>
>
> Hi Bob,
>
>  > I think it was also in Wireless World that I read how
>  > magnetic fields where just relativistic effects of
>  > electrostatic fields. It derived the magnetic force between
>  > parallel wires carrying a current using only electrostatics
>  > and relativistic effects.
>
> I have seen these relativistic calculations for electrostatic
> charge and magnetic fields.  The presentations I saw produce the
> wrong unit for magnetic field.  If the equation produces the
> wrong unit for magnetic field, then it would seem that the theory
> is a failure.  Can you provide a link or precise equations for
> calculating a relativistic magnetic field from electrostatic
> charge so we can see whether the equation is correct or not?  I
> can't find the web page I saw this on.
>
No I can't provide a link (back then the internet did not exist LOL)
Perhaps back way back issues of Wirlessworld can be found on the web.
Sorry no equations either.
Given invariance in any moving frame i.e. Special Relativity I think it must
be true.
You may be able to prove it with the property of the Lorentz transformation
given its a linear tranformation.
Something along the lines of its just vector and the moving frame (Lorentz
tranformation) determines how much goes to E and H.

You have me curious about the units as I figure the units would be force per
unit of I or E

I found this link http://en.wikipedia.org/wiki/Magnetic_field yes hardly a
definitive source.
It does however confirm the above and claims Einstein pointed it out in
1905.
Main stream for 100 years. Ouch and I thought it was a radical new idea. I
hope they teach this stuff better these days.
I find the idea that there is only one field very satisfying as there is
only one type of photon.
If magnetic fields are just relativistic effects of electrostatic fields,
what are the equivalent relativistic effects of gravity, the weak and strong
forces fields.

Robert (R. A.) Jones
A1 Accounting, Inc., Fl
407 649 6400