@humy saidGo ahead and copy and paste it from wikipedia since you do that best. Prove that it meets the definition of "spin".
Just look it up in wiki and you see how I define it.
I define it whichever way science does, just like I should.
Unlike you, I don't make crap up.
@metal-brain said"Prove that it meets the definition of "spin"" according to who or what? You or science?
Go ahead and copy and paste it from wikipedia since you do that best. Prove that it meets the definition of "spin".
And which definition of 'spin'? The 'spin' defined by science or your personal definition of the word 'spin'?
If the former, prove that the said spin by wiki is not that defined by science.
If the latter, why should we care if it doesn't conform to your personal definition of 'spin'? I don't.
@metal-brain saidYeah, it is really "spin." That's the name we've given it. A charm quark is a charm quark regardless of how charming it is.
I'm just going by the wikipedia links you keep referring me to. It isn't really "spin".
"Because of this, it turns out that the notion of a quantum particle literally "spinning" about an axis does not exist."
https://en.wikipedia.org/wiki/Angular_momentum
"In quantum mechanics, angular momentum (like other quantities) is expressed as an operator, and its one-dim ...[text shortened]... ar momentum, but this angular momentum does not correspond to spinning motion in the ordinary sense"
@kazetnagorra said, or, for that matter, regardless of how repulsive or ugly it is.
A charm quark is a charm quark regardless of how charming it is
11 Jan 20
@metal-brain saidThe laws of physics are invariant under rotations. Someone called Emmy Noether proved that a symmetry implies the existence of a conserved quantity. The conserved quantity in the case of invariance under rotations is angular momentum. Orbital angular momentum and spin are jointly conserved, it is their sum that is conserved. This means that spin is a form of angular momentum.
I'm just going by the wikipedia links you keep referring me to. It isn't really "spin".
"Because of this, it turns out that the notion of a quantum particle literally "spinning" about an axis does not exist."
https://en.wikipedia.org/wiki/Angular_momentum
"In quantum mechanics, angular momentum (like other quantities) is expressed as an operator, and its one-dim ...[text shortened]... ar momentum, but this angular momentum does not correspond to spinning motion in the ordinary sense"
In Quantum Field Theories the elementary particles are assumed to be point-like. However, in String Theories they are assumed to be small loops. We have theories of these things and can make statements about the objects in the theories, but that is different from making statements about the things in themselves. So, yes, intrinsic spin is not the same as macroscopic rotation.
@deepthought said"So, yes, intrinsic spin is not the same as macroscopic rotation."
The laws of physics are invariant under rotations. Someone called Emmy Noether proved that a symmetry implies the existence of a conserved quantity. The conserved quantity in the case of invariance under rotations is angular momentum. Orbital angular momentum and spin are jointly conserved, it is their sum that is conserved. This means that spin is a form of angular m ...[text shortened]... ts about the things in themselves. So, yes, intrinsic spin is not the same as macroscopic rotation.
What is the difference?
@kazetnagorra saidDefine spin.
Yeah, it is really "spin." That's the name we've given it. A charm quark is a charm quark regardless of how charming it is.
@metal-brain saidLook it up at wiki to see how science defines it because THAT is how we define spin.
Define spin.
@metal-brain saidFor starters, one has speed of rotation and the other doesn't.
"So, yes, intrinsic spin is not the same as macroscopic rotation."
What is the difference?
@metal-brain saidintrinsic[ in-trin-sik, -zik ]
Define intrinsic.
adjective
belonging to a thing by its very nature:
the intrinsic value of a gold ring.
Anatomy. (of certain muscles, nerves, etc.) belonging to or lying within a given part.
12 Jan 20
@metal-brain saidI discussed that in the second post on the first page of this thread.
"So, yes, intrinsic spin is not the same as macroscopic rotation."
What is the difference?
13 Jan 20
@kazetnagorra saidSo it's spin is intrinsic? Does that mean it cannot help but spin? Is spinning the nature of an electron? What does that mean?
intrinsic[ in-trin-sik, -zik ]
adjective
belonging to a thing by its very nature:
the intrinsic value of a gold ring.
Anatomy. (of certain muscles, nerves, etc.) belonging to or lying within a given part.