Re: Relativity question
From: RP (no_mail_no_spam_at_yahoo.com)
Date: 03/24/05
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Date: Wed, 23 Mar 2005 19:18:33 -0600
bz wrote:
> RP <no_mail_no_spam@yahoo.com> wrote in
> news:3ado27F6ag1a9U1@individual.net:
>
>
>>>I have discussed your conjecture with one of the professors that works
>>>with electron beams. He is interested in testing the idea. I will let
>>>you know what results we get if he can get some time to test the idea.
>>
>>That's just friggin fantastic! If it goes, and goes well, then I've
>>got a few other experiments in mind.
>>
>>
>
>
> one question that came up in our discussion:
>
> Since electrons have electrostatic charges and repel each other, how can a
> beam of electrons stay together without their mutual magnetic fields
> drawing them together?
Electron beams will diverge unless an external field is applied to
keep them focused. The divergence will decrease with increasing beam
speed. At high speeds a relatively small counter-flow of positive
charges will cause the beam to contract.
>
> The expression of electrostatic charge is NOT dependent on motion, is it?
For two point charges (quanta) I get:
-F = [3kqq'(relative tangential velocity component)^2 ]/(4 c^2 d^2)
as the *only* force acting between these quanta. Seems to be very much
dependent on motion.
>
> I suspect that a beam of electrons is always oscillating about the axis of
> motion as the electrons are pulled toward each other and then veer off due
> to range repulsion.
Electrons never attract each other.
>
> It will be very interesting to see if a beam of electrons has a magnetic
> field, even when there is no external magnetic field applied.
It would be very interesting for me to see you see it.
>
> What about a bunch of electrons caught in a magnetic trap and cooled? I
> remember something about such an experiment.
What about it?
Magnetic fields exist, and electrons are deflected by them as
classically prescribed. But if you generate a ring of electrons in a
magnetic trap, then they will not generate a magnetic field, unless
some positively charged particles are also trapped and are rotating
counter to the electron charge. In many vacuum tubes the electron beam
is accompanied by a reverse flow of positive ions, and we should
expect a magnetic field to be generated external to this system of
charges. If you want to test for a magnetic field of a monopolar beam
then you need to eliminate reverse flowing charges of opposite sign.
>
> Ah yes, here is an interesting experiment, not what I was looking for but
> interesting anyway:
>
> http://www.europhysicsnews.com/full/18/article2/article2.html
> [interesting quote]
> Thus the electron spends less than no time in the vicinity of the
> scattering centre. This "hole in quantum space" may be thought of as
> representing the destructive interference of the incoming and scattered
> outgoing s-waves, a quantum hop of matter from one position to another,
> the matter disappearing from one side of the scattering centre and
> reappearing at the other in a process of nanoscopic matter-wave
> teleportation. [unquote]
This passage sounds like metaphysics to me.
Richard Perry
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