Orientation of L and S - Hyperfine Course

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March 12, 2023 at 3:12 pm #4199

DriesHendrikx
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J can only be 2 if L=1 and S=1, so L and S are parallel.
J=0, therefore (L,S) must be (1,-1), so L and S are antiparallel.
J=1 is only possible when (L,S) = (1,0) or (0,1), so they are perpendicular.
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