- #1
KFC
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Suppose for a system with two levels with corresponding rotational quantum number J=2 and J=1, each of these have sublevels corresponding to [tex]J=2: m_J=-2, -1, 0, 1, 2[/tex] and [tex]J=1: m_J=-1, 0, 1[/tex], tune the external field such that we have transitions corresponds to [tex]\Delta m_J=-1, 0, 1[/tex]. So how many different frequencies will be observed? And for the transition [tex]\Delta m_J=0[/tex], does it mean the corresponding observed frequency is ZERO? How come?