1. The problem statement, all variables and given/known data A 10-eV electron is incident on a potential barrier of height 25eV and width 1 nm. Use equation 6-76 to calculate the order of magnitude of the probablity that the electron will tunnel through the barriers. Repeat with width .1nm 2. Relevant equations Equation 6-76 is: E = Electron Enegy V = Potential a = width T = 16 (E/V) (1- (E/V) e -2aw To get w w = sqrt ( 2m (V-E)) / hbar where m = mass of electron hbar= 6.582119 x 10-16 eV*s 3. The attempt at a solution I know these are the right answers ( they are given) 4.95 x 10-13 and 0.197 Seems to be a simple plug and chug problem, but, However, when I plug the known values into my calculator, the expontential goes to 0. I dont know if my dimensional analysis matched up or not (im using hbar in ev*s though), or maybe my calc is limited in the size of the numbers it can display. Also, IM not sure what 'order of magnitude' means in the context of the question.