(adsbygoogle = window.adsbygoogle || []).push({}); "Old" quantum mechanics

There is famous Bohr Sommerfeld quantization rule which says that [tex]\oint p dx = n h [/tex]. Is it possible to apply this rule to three dimensonal system e.g. hydrogen atom.

The integral will probably look as follow:

[tex]

\int \sqrt{2E - \frac{l^2}{r^2}+\frac{\alpha c \hbar}{r}} = n h

[/tex]

But I don't know which the contour I should chose.

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# Old quantum mechanics

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