 #1
Ashish Somwanshi
 31
 4
 Homework Statement:

Consider a potential step with a height of V0=0.5eV. An electron is incident from the lower potential side (where the potential energy is set to equal to zero) with an energy E=0.3eV.
Find the penetration depth which is defined as the distance into the barrier region at which the probability decreases to 1/e of its initial value at the potential discontinuity, z=0.
Give your answer in unit of nm. Answers within 5% error will be considered correct.
 Relevant Equations:
 Eta = hket/(2m(VoE)), where eta is the penetration depth and hket=1.05×10^(34)
I don't understand where I went wrong, the formula and calculations which I have attached are correct...please do help if anyone can spot the mistake.