1. The problem statement, all variables and given/known data The wavelengths λ of spectral lines produced by the Hydrogen atom are given by the expression: . Calculate the Energy in eV required to ionise the atom 2. Relevant equations p=h/[tex]\lambda[/tex] 3. The attempt at a solution n2 = 1 and n1 = infinity, therefore [tex]\lambda[/tex]=1/R. E = p2/2m = h2/([tex]\lambda[/tex]^2*2Me) Subbing in [tex]\lambda[/tex]=1/R. and rearranging gives: E = (h2R2)/(2Me) Why doesn't this give me the right answer?