1. The problem statement, all variables and given/known data An electron of energy E = 2.10 eV is incident on a barrier of width L = 0.67 nm and height Vo = 3.10 eV What is the probability that the electron will pass through the barrier? 2. Relevant equations I know that T=Ge^-2KL. K=2pi*sqrt((E-Uo)/1.505eVnm^2)) G=16*(E/Uo)*(1-(E/Uo)) 3. The attempt at a solution K=5.12nm^-1 G=3.5 T=3.5*exp(-2*(5.12nm^-1)*(.67nm)) nm cancels in the exponent so: T=3.5*exp(-2*5.12*.67)=3.5*.001=.35% This isn't the right answer though. I've tried 3.5, 35, .035, and .0035 and none of these answers are right. Any help? Thanks!