1. The problem statement, all variables and given/known data A photon emitted during an electronic transition in a hydrogen atom has a wavelength of 486.2 nm. From what initial energy level (ni) did the electron transition? 2. Relevant equations Energy = hc/wavelength (h = Planck's constant; c is speed of light; and wavelength is 486.2 nm or 486.2 x 10^-9 meters). Energy = Rydberg's constant(1/n-final^2 - 1/n-initial^2) 3. The attempt at a solution I calculated the energy but I I can't solve for two variables at once in one equation. How am I supposed to find the initial energy level when I have the final energy level?