1. The problem statement, all variables and given/known data An electron makes a transition from the third energy level to the lowest energy level in a box of width 0.1 nm. what is the wavelength of the emitted photon? Compare this wavelength with the wavelength associated with the transition from the third energy level to the ground state level in hyrdogen. (The ground state energy of hydrogen is 13.6 eV. ) 2. Relevant equations 3. The attempt at a solution I am really lost. And this is one of the review questions for the test coming up. Can anyone please get me started or at least point me in the right direction? I would REALLY aprreciate it! Thanks!