1. The problem statement, all variables and given/known data There's two parts. Part A) Find the Probability than an electron will tunnel through a barrier if energy is 0.1 ev less than height of the barrier. Barrier is 1nm. Part B) Find tunneling probability if the barrier is widened to 3 nm. 2. Relevant equations I believe relevant equations are attenuation factor alpha = sqrt (2*m*(Uo-E)/h^2) and that Probability = psi^2. Psi = A*e^(-alpha * x). Probably should mention that h = planck constant and m = mass of electron, Uo-E = change in energy 3. The attempt at a solution I don't know how to write my solutions out here. I don't have a reference textbook on quantum physics on me, so I'm doing this by memory as much as I can. I calculated attenuation factor (alpha) but did not know what to do with it. I don't know what A is and what x is. Again, this is coming from memory, so I don't know how far away from the solution I am.