Re: Is electron's spin same direction as it's magnetic field

On Jul 26, 11:07 pm, "gu...@xxxxxxxxxxx" <gu...@xxxxxxxxxxx> wrote:

<<
Q: Does the electron spin in the same direction
as it's magnetic field?

A: Yes...except when it doesn't.



<< Every electron has a magnetic moment and spin
quantum number s = 1/2, with magnetic components
ms = +1/2 and ms = -1/2. In the presence of an
external magnetic field with strength B0, the electron's
magnetic moment aligns itself either parallel (ms = -1/2)
or antiparallel (ms = +1/2) to the field,

I don't understand, above the electron's magnetic moment thus it's
magnetic field's spin direction aligns itself in two ways with another
magnetic field where as the right hand rule specifies only ***ONE***
(and not two) alignement (deflection direction) direction.

Perhaps that has been the subject of study.

http://www.google.com/search?hl=en&q=%22spin+flipping%22&btnG=Google+...

Sue...

Well the incoherent "problem" is that "antiparallel" usually means
anything but parallel where as in their terminology it means NEGATIVE
direction.

Therefore since the charge's direction is parallel to the other
magnetic field [where sin(angle)=0 and angle = 0 or 180] has no effect
therefore a charge can move both in positive or negative
(antiparallel) direction without it being affected by the other
magnetic field (including spin flipping).

But if it were to divert at any other angle it would immediately be
derailled and it's direction deflected in correspondence with the
right hand rule, thus only "one" possible direction.

The weak magnetic field associated with an
an electron's spin is not closely related to the magnetic
field associated with an electron's trajectory

oh...life is complex.

Does an electron always spin in a specific direction when moving in a
straight trajectory?

Clearly not. We couldn't flip them otherwise. This doesn't
help us form a nice modular concept of an electron, but
we are not suppose to. Fundamental particles are ghosty
creatures with both wave and particle qualities that can
*appear* to go on both sides of a bi-prism simulaneously.

They share enough characteristics with composite matter
to make us ~think~ they are ~real~ but also they
violate enough of the composite matter rules, to appear unreal.

What to do? We have to describe them by mathematical
formula, accepting that the description of the particle
will be more accurate if we don't try to combine equations
beyond what we can prove.

Heaviside reduced Maxwell's original 20 equations to 4
equations. The spooky nature of the electron is in part
why those four equations can't be further reduced to
two equations.

So avoid reinventing a wheel that mathematicians and
physicist have not been able to roll in over 100 years
of trying.

Keep the magnetic components separate by *assuming*
that the component related to spin just holds the particle
together and has angular momentum.

*Assume* that the magnetic component related to
trajectory exist only *relative* to motion wrt to
other charges. (Right hand rule, superposition ect )

Then you have two sets of equations that don't
fit together as you would expect for nomal matter.
But it doesn't matter, because electrons aren't
normal matter.

Intuition says we should be able to treat the electron
like a spinning top and simply use everyday momentum
equations to combine equations. But intuition is
wrong, as demonstrated by Zeeman, Stern-Gerlach
Spin-flipping experiments and Pauli exclusion.

So give up on the spinning top analogy, because
only half of it works out in practice. The other half
does spooky things that have to be described with
some very abstract mathematics.

You can completey ignore the electron's spin and
account for 99 percent of its behavior by studying
its trajectory *relative* to other charges.

http://son.nasa.gov/tass/content/electromagnetism.htm
http://en.wikipedia.org/wiki/Multiple_integral#Some_practical_applications

Then you have the tools to understand how spin
modifies the electron's behaviour.

IOW... Horse goes in front of cart. ;-)

Sue...




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