1. The problem statement, all variables and given/known data There is a thin tube in which a finite potential trap has been set up where V2 = 0 V. An electron is shown traveling rightward toward the trap, in a region with a voltage of V1 = -9.00 V, where it has a kinetic energy of 2.00 eV. When the electron enters the trap region, it can become trapped if it gets rid of enough energy by emitting a photon. The energy levels of the electron within the trap are E1 = 1.0, E2 = 2.0, and E3 = 4.0 eV, and the nonquantized region begins at E4 = 9.0 eV as shown in the energy-level diagram of Figure b. What is the shortest wavelength such a photon can have? 2. Relevant equations E= hc/λ Ekin=1/2mv2 3. The attempt at a solution I guess the shortest wavelength occurs at the highest energy level, that is, in the nonquantinized region? However, I do not know what to do with the given voltages. I know that E=qV Can somebody help me?