1. The problem statement, all variables and given/known data Consider electrons in a Kronig-Penney model with the following parameters: a=b=3 angstroms Uo=10.0 eV Calculate the effective mass of the electrons near the start of the first allowed band. You can find this by fitting the E-k results to an equation E=E1+(hbar^2 x k^2)/(2m*) where E1 is the start of the first allowed band. 2. Relevant equations 3. The attempt at a solution I have no clue where to start. Since I'm trying to find m*, it will probably be in relation to E, so how do I calculate E from the given values?