Thread: Quantum number.
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lethe
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#6
Nov21-03, 07:03 AM
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every time the system has a symmetry, there is a quantum number that labels which state of the symmetry that the system is in.

for example, there are many ways that rotations can act on a quantum system, and if the system is a rotationally symmetric one, then whenever the system starts in one of those states, it has to remain that state.

the spin quantum number is just a number to label which of those states the system is in.