The compass, according to legend, was invented by the Chinese a couple of
thousand years ago.
And rockets, too.
Now, unfortunately, they have noticeably shredded and are only busy
growing infectious mutating viruses.
 
The main part of the compass is the magnetic needle needle. It is a small
lightweight permanent magnet. The geomagnetic field turns it along the
magnetic meridian. That’s the trick.
A magnet is a ferromagnet, that is, a substance capable of magnetization due
to the small zones of spontaneous magnetization in it, called domains. In
them, all the electrons are turned by their magnetic moments, their spins, in
one direction.
 
Question: Is it possible to make a compass from some kind of pure, non-alloy
metal or something else THAT DOES NOT HAVE the PROPERTIES OF A
FERROMAGNET?
Answer: It is impossible, because such a material lacks the ability to
magnetize at all!

 
Now let’s think about this.
As you know, and I have already written about this, in addition to the
permanent geomagnetic field, there are its minimariations, that is,
fluctuations in the direction and intensity of this field. They have different
cycle lengths, from annual to seconds. Such fluctuations in the geomagnetic
field are caused by the fact that the Earth is in the sphere of influence of
streams of fast charged particles emitted by the Sun. Interacting with their
magnetic fields with the geomagnetic field, they cause various kinds of
changes in it: Different fluctuations in the intensity of this field, its direction
and frequency of cycles.
But a magnetic field that changes quickly enough induces eddy electric
fields, which in conductors can also cause eddy electric currents, the so-
called Foucault currents.
This means that if we make an arrow from the purest copper, aluminum,
silver or gold, from any metal that is not a ferromagnetic, then these changes
in the geomagnetic field will induce eddy currents in it, which with their
magnetic fields will interact with the main geomagnetic field, which means
that an ABSOLUTELY NON-MAGNETIC arrow will somehow react to
these changes. and its movement will NOT be an indicator of the
GEOMAGNETIC FIELD ITSELF, but only of its rather rapid changes.
I wonder in which direction it will turn and oscillate!?
Perhaps its fluctuations will be in two planes.:

7 I 2025

P.S. Due to my own usual perplexity, I again made the same mistake that I had already made in these cases before: the COPPER NEEDLE on the needle axis will NOT vibrate under the influence of fluctuations in the geomagnetic field (as the usual magnetic compass needle does not do), but a SUSPENDED copper plate CAN “behave” in this way.

Oscillatory movements NECESSARILY require at least two counter-directional forces, one of which may be the force of the transverse elasticity of the twisting thread! The other is the interaction of changing induction magnetic fields of a copper plate caused by fluctuations in the magnitude and direction of fluctuations in the geomagnetic field with its static component.

The copper arrow on the needle axis did not “think” even of changing its orientation in any way. And as soon as I hung it up, it immediately began to make slow regular fluctuations around the vertical axis. They are NOT RELATED to air currents, since it was placed in a glass jar, isolating it from possible purely mechanical disturbing factors.

3 III 2025