ok, this clarified some things up, especially explaining the transitions.
EDIT-
thanks, i got it. Also managed to understand things properly along the way.
Homework Statement
In the spectrum depicted bellow (see added picture) are spectral lines which resulted from emissions of a photon due to an electron decaying from a higher to a lower orbital in a Hydrogen-like atom (meaning- only one electron. No details about the nucleus)
All lines in the...