Re: Felix Ehrenhaft

Tom wrote:
Hans wrote:
Magnet ions ( Ehrenhaft brought small magnetic particles 10-5 cm in a
magnetic field, part of the particles went to the north pole, part of it
to the south pole and part of it stayed stationary like expected for
small magnets in a uniform field)

Igor Khavkine wrote:
Many atoms (and hence also ions) have non-zero magnetic moments,
nothing unusual here. Atomic magnetism has been under investigation
throughout the 20th century. Although, his interpretation of this
phenomenon likely included the presence of magnetic charge, again
untenable (see below).

I fail to understand why the atoms having a non-zero magnetic moment could
explain Ehrenhaft's results. He uses "magnetic" particles, which have then
necessarily a non-zero magnetic moment. That they are single atoms or
anything else doesn't matter. Or perhaps haven't I understood what you mean
by "non-zero magnetic moment".

I meant "non-zero magnetic dipole moment", like a bar magnet.

Sure that his interpretation include the presence of magnetic charge, as
made explicit by himself, but what is to be seen below doesn't explain
*that* experiment. So what is the real explanation? (not atoms of non-zero
magnetic moment, and not the results of other experiments.) Your
interpretation is clearly inconsistent with empirical data.
I confess I had difficulties to follow your account, since it seems to
address the problem while it doesn't, which isn't so easy to notice.

While I was looking up Ehrenhaft's experiments, I couldn't find an
account of the one you refer to. The OP didn't make it any easier by
not providing references for specific experiments. Without any details
to go on, all I could say is that the motion of atoms and ions due to a
magnetic field is consitent with these particles having a magnetic
dipole moment and is not a priori surprising. The inconsistency with
the magnetic (monopole) charge interpretation comes from the fact that
these have not been observed in any other experiment.

If you can find a reference for the specific experiment described
above, perhaps more can be said.

Igor

.

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