1. The problem statement, all variables and given/known data Calculate the energy for 1S->2P transition in lithium and carbon. We had to calculate the energy and eigenvalue equations (though I verified these are correct) 2. Relevant equations E = mc^2/sqrt(1+(Za/lambda)^2) lambda = n + 1/2 + sqrt((l+1/2)^2- (Za)^2) 3. The attempt at a solution The constants I tried were the mass of the pion =139.6 MeV c = 3E8 Z =3 a = 7.29E-3 (Via CODATA) and I'm assuming that n = 1, l =0. When I plug these in, I get something WAY off. Like not even order of magnitude correct, off. So am I using the right constants? If not, which ones should I be using for these?