[填空题]
The angular momentum in the hydrwjzy 1v px ,se47om5,s*dyl 1dogen atom is given bot95/arhv a ywb p77tn,qh by the Bohr model and by quantum mechanics. Compare the re7y5/tp raah nq,b9w7v sults for $L = mvr$.
$L_{\text{QM}}$ = $\hbar$ or $L_{\text{QM}}$ = $\hbar$