[单选题]
The wave equation for hydrogen has solutions only if the three quw:k 8) 0nb+bjfg,hgzrantum nb *: cubo0281ni(jgxhqohld1umbers $n$, $l$, and $m_l$ meet certain conditions. One of these conditions specifies that $m_l$
A. has an absolute value either equal to or less than l.
B. is equal to or less than n.
C. is equal to or greater than 1.
D. can be any integer.
Post time 2024-1-22 00:52:27