[填空题]
The angular momentum in t6wgbe:;jr;6ws9w,c 5jeliv hhe hydrogen atom is given both by the /7ywije06p2a72:p q3rhda ilub b h i dn*kt4-Bohr model and by quantum mechanics. Compare the results for /e4a 3ibkhn0r2hwq-dj*y6i 2bp77 ti:a du lp$L = mvr$.
$L_{\text{QM}}$ = $\hbar$ or $L_{\text{QM}}$ = $\hbar$