Why is the angular momentum defined as the cross product of linear momentum and the radius?
55890
Why do we use cross products in physics?
62693
Eigenspaces of angular momentum operator and its square (Casimir operator)
142399
When conserving angular momentum, about which point(s) should it be calculated?
69188
Why is conservation of angular momentum considered a law?
87962
Why is $\langle \textbf R \rangle =Tr \rho R$ here $\rho$ is the state density matrix
58445
What does the Canonical Commutation Relation (CCR) tell me about the overlap between Position and Momentum bases?
150133
Why is work scalar and the dot product of force and displacement?
13137
Why are Hermitian operators linked to observables?
154772
The Momentum Operator in QM
26959
Why doesn't the uncertainty principle contradict the existence of definite-angular momentum states?
89004
Where does the partial derivative come from in Sakurai's derivation of the momentum operator?
73624
Why is orbital angular momentum quantized according to $I= \hbar \sqrt{\ell(\ell+1)}$?
146772
Poisson brackets of three dimensional angular momentum and its Lie algebra
69031
Square of angular momentum operator in spherical coordinates
1086
What is the physical significance of dot & cross product of vectors? Why is division not defined for vectors?
128276
Quantization of orbital angular momentum
123911
Why is the derivative of a vector orthogonal to the vector itself?