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Is it analogous to the spin velocity of the earth and its Quasi equilibrium spin energy?

2006-09-19 02:27:41 · 3 answers · asked by goring 6 in Science & Mathematics Physics

3 answers

Man, you have asked a great question!

But, first and foremost it is rationally impossible for a point particle as defined by the Standard model to have any spin at all. It would be like trying to say that the exact mid point of a spinning Frisbee was rotating. If it IS a point, then it cannot rotate because it has no dimensions. Neither is it a point orbiting some other arbitrary point. This is one of the considerations that led to the development of String Theory and lead physicists to question the validity of the Standard model.

Second, the "spinning" is actually an angular velocity expressed in some magnitude of 'H-bar' -- like: -1, 1 1/2, -1/2. H-bar is a small fraction of the Planck length.

Uhlenbeck and Goudsmit ( deriving from work done 100 years earlier by Ampere) in 1925 developed the initial idea of spin to satisfy data resulting from experiments about why electrons cause magnetic fields and how these can be imparted between materials. The other spin values were developed to satisfy mathematical models of the tables of elementary particles (whether point or string). The number values assigned are what must be in order for there to be order in physics based upon the mass of the particles.

Read Brian Greene, The Elegant Universe, mostly in Chapter 7, but you must seriously read most of the book to begin to understand this and its implications.

To your subquestion -- No

2006-09-19 02:53:24 · answer #1 · answered by Nightstalker1967 4 · 0 0

With a magnet.

Spin refers to a magnetic moment of a particle. Because it has long been known that magnetism arises from movement of electrical charges, it was originally assumed that this magentic moment arose from charged fundamental particles "spinning" on their axis, and hence the name. Despite the fact that this is now known not to be the origin of spin (its origin is a special relativistic effect on the Schroedinger wave equation - the revised equation is called the Dirac equation) the poor name stuck.

2006-09-19 12:07:58 · answer #2 · answered by Anonymous · 0 0

it starts spinning

2006-09-19 09:29:54 · answer #3 · answered by Republican™ 3 · 0 0

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