I'm doing some reading on quantum mechanics and have a quick question about angular momentum.(adsbygoogle = window.adsbygoogle || []).push({});

In the derivation of the eigen values of J (which is either L or S), it starts out like this:

Jz (Pm) = hm (Pm)

Where Pm is Phi sub m, h is h bar and m is the eigen value. (sorry my latex is a little rusty). And then they explain using J+ or J- which I understand.

So my question is why did they include the h bar, where does it come from?

And same thing goes with the derivation of J^2.

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# Angular momemtum question?

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