Homework Statement
For the linear momentum operator ##\hat{\mathbf{p}}## and angular momentum operator ##\hat{\mathbf{L}} ##, prove that ##\begin{eqnarray}
[\hat{\mathbf{L}},\hat{\mathbf{p}}^2]&=&0\end{eqnarray}##:
[Hint: Write ##\hat{\mathbf{L}}## as the ##x##-component of the angular...