# Homework Help: Quantum Tunneling

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1. May 24, 2015

### alexis12

1. The problem statement, all variables and given/known data
What is the approximate transmission probability (in %) of an electron with total energy 1.524 eV through a barrier of thickness 343 pm, and a potential height of 2.654 eV? (Does it matter what the potential energy is before and after the barrier? Not really, as long as it is <1.524 eV, so in both cases there is a travelling wave.)

2. Relevant equations
None given however I believe it has something to do with: http://en.wikipedia.org/wiki/Transmission_coefficient

I've managed the previous question which was about probability of transmission however it didn't deal with barrier thickness which I am not accustomed to. I can't find any literature on the subject other than the Wikipedia article I linked.

3. The attempt at a solution
No real attempt, I managed to calculate Kappa which is
K = Square root of {[2m(E-V0)] / (h-bar^2)}

2. May 24, 2015

### alexis12

Figured it out! It's exp(-2 *kappa *barrier thickness)