Relativity of spin
Name: lord corwin
Date: Around 1993
Is it not a basic assumption in relativity theory an object is
motionless relative to itself? If this is so, should this not also include
spin? It seems to me that with only itself as a reference, an object cannot
be spinning, but if this were so, then I would not understand how central
force could work, or even exist.
Well, relativity and quantum mechanics have not been reconciled
...yet... Actually, though, your statement is not really true. A point object
ought to be motionless with respect to itself, yes, but an extended object can
be rotating, and there is a real meaning to rotation in our universe.
Relativity eliminates the idea of a special frame of reference for
translational motion, but there is still a special rotational frame of
reference in our universe, and an object that is rotating relative to this
frame really does experience the centripetal acceleration and corresponding
apparent centrifugal force that tends to pull rotating objects apart. And, I
guess, an elementary particle with spin really has some angular momentum.
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