Hiya,

Im working through a report at the moment and trying to calculate wavenumber approximation and in the equation it contains variable called **J** and is defined as "the quantum number of the lower rotational energy level involved in the transition"

Ive been reading and cant seem to understand what this is asking. Google and many other sources tell me that J is the rotational quantum number but dont define it?? Is it related to the angular momentum quantum number somehow?

thanks =]