Re: Retarded propagation of magnetic field leads to contradiction

From: Eugene (eugenev_at_synopsys.com)
Date: 07/30/04 

Date: Fri, 30 Jul 2004 12:37:49 -0700

Myxococcus xanthus wrote:
> Eugene <eugenev@synopsys.com> wrote in message news:<4109EF69.3030503@synopsys.com>...
>
>>Consider simple experiment:
>>
>>A magnet and a wire loop are separated by the distance R.
>>If both of them are at rest, there is no current in the loop.
>>
>>If the magnet starts to move then (we assume that the
>>magnetic field propagates with the speed of light) the current
>>starts to flow in the loop only after time R/c
>>
>>If the magnet stands still, but the loop moves and
>>crosses the magnetic lines, the current starts to flow
>>immediately.
>>
>>As from the relativity principle both these situations should
>>be equivalent, we got a contradiction.
>>
>>SOLUTION OF THIS PARADOX: Magnetic field propagates
>>instantaneously.
>>
>>This solution cannot be rejected by invoking the causality
>>paradox (i.e., apply the Lorentz transformations and show that
>>there is a moving frame of reference in which current starts to
>>flow BEFORE the magnet moves) This is because the
>>Lorentz transformations are not exactly applicable to this system:
>>One should take into account their dependence on interaction.
>>Then, the shift of the magnet and the onset of the current become
>>simultaneous in ALL reference frames.
>
>
> Consider simple experiment:
>
> A tuning fork and you are separated by the distance R. If both the
> tuning fork and you are at rest, you hear a pure A-440 note.
>
> If the tuning fork starts to move towards you then (we assume that the
> sound propagates with the speed v_s) you hear the doppler-shifted,
> slightly sharp A only after time R/v_s
>
> If the tuning fork stands still, but you start to walk towards the
> fork, you hear a doppler-shifted note immediately.
>
> As from your misunderstanding of the relativity principle both these
> situations should be equivalent, we got a contradiction.
>
> NON-SOLUTION OF THIS NON-PARADOX: Sound propagates instantaneously.
>
> Duh.
>
> Myxococcus xanthus

OK. I agree. You convinced me that my argument was not good,
so I withdraw this idea. Thanks.

However, this does not mean that I accept the idea of retarded
Coulomb and magnetic interactions. Retarded interactions inevitably
lead to "exchange of virtual particles". Nobody have observed virtual
particles. In my view, the Coulomb and magnetic
forces between charged particles are instantaneous.
In addition, when a charged
particle accelerates, it emits bremsstrahlung photons. In classical
picture we describe these photons as electromagnetic wave propagating
with the speed of light. This "wave" is responsible for the secondary
retarded interaction between charges, which is easily observed
(e.g., in radio). So far, nobody has measured the speed of propagation
of the direct Coulomb and magnetic potentials. I would predict
that this speed is infinite.

Actually, I have more arguments to back this proposal, but they
do not fit in a short posting. You may take a look at
E.V.Stefanovich "Is Minkowski Space-Time Compatible with Quantum
Mechanics?" Found. Phys. 32 (2002), 673-703.

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