1. The problem statement, all variables and given/known data What are the energies of the characteristic Kα line and Kβ lines? 2. Relevant equations K-shell ( n =1):-69.5 keV L-shell ( n =2 ): -11.3 keV M-shell ( n =3 ): -2.30 keV Z = 74 E = (energy level) (Z-1)2/n2 3. The attempt at a solution for alpha i have (-11.3keV) (74-1)2/22 for n =2 i know to find the energy characteristic i need to go from n=1 to n=2. so i know E = E1-E2 but for n=1 do use the energy level of the Kshell or the energy level of the Lshell? in the lecture notes the instructed used the same energy level but didnt specify which one.