Electron spin

@metal-brain said
What was the speed?

It's angular momentum, not speed.

Read more:
https://en.wikipedia.org/wiki/Spin_(physics)

@Metal-Brain
You make assumptions with that question. Like you would have to know the size of the thing and a way to measure it. What if an electron is actually a point size particle, somewhere around plank constant size. Then you would have to know how many RPS it was flying and THEN you could calculate 'speed'.
But it would be velocity anyway, not just speed which is more like a car speeding down the road in a straight line.

@kazetnagorra said
It's angular momentum, not speed.

Read more:
https://en.wikipedia.org/wiki/Spin_(physics)

You said electron spin speed could be measured and now you are claiming there is no speed to measure. You have contradicted yourself.

@metal-brain said
You said electron spin speed could be measured and now you are claiming there is no speed to measure.

That's what ALL us science experts have been telling you all the long.

You have contradicted yourself.

No, it isn't a contradiction. And this quote shows you are confused.

@kazetnagorra said
Intrinsic electron spin can be measured in numerous ways, the classic example is the Stern-Gerlach experiment.

https://en.wikipedia.org/wiki/Stern%E2%80%93Gerlach_experiment

Maybe you should have looked that up before commenting on it?

You said it can be measured. Now you are saying it can't.

You are contradicting yourself.

@metal-brain said
You said electron spin speed could be measured and now you are claiming there is no speed to measure. You have contradicted yourself.

I said spin could be measured. I posted this link on the first page of this thread. Perhaps you ought to consider reading it?

https://en.wikipedia.org/wiki/Stern%E2%80%93Gerlach_experiment

@metal-brain said
You said it can be measured. Now you are saying it can't.

You are contradicting yourself.

He never said electron spin can't be measured.
He clearly didn't contradict himself.
What is wrong with you?

@Metal-Brain
So maybe you will learn something if you deign to actually read his post.

@humy said
He never said electron spin can't be measured.
He clearly didn't contradict himself.
What is wrong with you?

He said this:

"It's angular momentum, not speed."

What is wrong with you?

@sonhouse said
@Metal-Brain
So maybe you will learn something if you deign to actually read his post.

Maybe you would.

@metal-brain said
He said this:

"It's angular momentum, not speed."

What about it?
How does that say/imply electron spin can't be measured?

@humy said
What about it?
How does that say/imply electron spin can't be measured?

He is saying there is no speed. No speed, nothing to measure.

@metal-brain said
He is saying there is no speed. No speed, nothing to measure.

Wrong.
There is spin without rotational speed to measure.

@metal-brain said
He is saying there is no speed. No speed, nothing to measure.

The spin is associated with a magnetic moment. In the Stern-Gerlach set up it's the magnetic moment that is measured.

@deepthought said
The spin is associated with a magnetic moment. In the Stern-Gerlach set up it's the magnetic moment that is measured.

What exactly is being measured and why is it called "spin"?