Re: Preferred reference frame

"Sbharris[atsign]ix.netcom.com" <sbharris@xxxxxxxxxxxxx> wrote in
news:1112561456.083584.293200@xxxxxxxxxxxxxxxxxxxxxxxxxxxx:

> It starts widening after it leaves the field of the focusing magnet
> coils.
>
> Electrons in a beam don't see each other has having magnetic fields
> from motion, since they (in their frame) don't see each other in
> motion. So far as they're concerned, the only thing that they have to
> do with each other is repel each other electrically. So the beam
> spreads radially due to simple charge repulsion.
>
>

Perhaps.

Since the electrons do not all originate from the same spot on the cathode,
they start from different positions.

As they pass throught the electrostatic accelerating anodes and the
electrostatic focusing anodes, they are given a motion inward toward the
center of the beam.

At some point, the focal length, they will be close together. Because of
their charges, they can not hit each other.

They HAVE been in motion with respect to one another, however. and this can
generate a magnetic field. Each electron's magnetic field can add to the
total magnetic field.

I suspect that the electrons oscillate about the axis of the beam because
of this field.

I suspect all observers will see the same thing.


--
bz

please pardon my infinite ignorance, the set-of-things-I-do-not-know is an
infinite set.

bz+nanae@xxxxxxxxxxxxxxxxxxxx
.

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