[填空题]
Use the Bohr theory to estimate s +mi47/f uppcss;6ehd6 * ,arzfvc+yxv7-u lthe wavelength zi 01f;/ *jjsf;ro etjfor an $n=3$ to $n=1$ transition in molybdenum $(Z=42)$. The measured value is $0.063 \, \text{nm}$. Why do we not expect perfect agreement?
$\lambda $ = nm
n =
