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I Angular Momentum, classical vector analogy?

  1. Apr 23, 2016 #1
    If one can't ever know all the three components of (QM) angular momentum, then can it even be considered as a "vector"?
    Is it only cause it transforms as a vector in a coordinate transformation?
  2. jcsd
  3. Apr 23, 2016 #2
    In Quantum mechanics L is vector operator!
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