1. The problem statement, all variables and given/known data Well,the problem is such : There are two hydrogen atoms.In each atom electrons were excited to the same energy level.Lifetime of one of the excited electrons is t1,when lifetime of other is t2. The question is : Which on of them had more wider spectral line,when during descend they emmited photons. 2. Relevant equations The regular hv=E2-E1=-13.6(1/(N1)^2-1/(N2)^2) [EV] 3. The attempt at a solution Well,I said that if one lifetime is bigger,then one of them descended directly to its original level (less time),and the one with bigger lifetime is the one that passed throught several other energy levels before returning to original.Thus,the one that passed throught several different orbits emmited several spectral lines ,when the one that returned "faster" to its original level has less "wider" spectral line. I might be badly mistaken (in my assumption that longer "lifetime" means ,it passed throught several different orbits before returning back to its original).