I've been researching the change of energy levels of electrons when excited by photons. The equations I have found are... E_n = (-2pi^2 * m * e^4 * Z^2)/(n^2 * h^2) Which gives us the energy of the electron at a particular energy level. m = mass of electron e = electric charge of electron Z = number of proton (atomic number) h = Planck's Constant n = Energy level (1, 2, 3, ....) Then there is... v = (E_n' - E_n)/h Which gives the frequency of the photon emitted due to a specified drop. So if we have an excited electron at level 6 and the electron drops all the way to level 1 then it is... v = (E_6 - E_1)/h If you combine the two then you get... v = ((-2pi^2 * m * e^4 * Z^2)/(6^2 * h^2) - (-2pi^2 * m * e^4 * Z^2)/(1^2 * h^2))/h Are these equations correct? Will it give me a photon frequency such that if such a photon were to get absorbed by an electron in the first energy level that it will jump up to the sixth energy level? Where v = c/λ then λ = c/v and this gives me the wavelength of the photon and thus the corresponding color along the spectrum.