An electron has a 2% probability of tunneling through a rectangular potential barrier. If this same energy electron impinged upon another barrier of the same height but twice the thickness, what would be its probability of tunneling?
A)4%
B)2%
C)1%
D)0.04%
E)0.004%

Question

Quizplus · Accepted Answer

The probability of tunneling decreases exponentially with the thickness of the barrier. If the thickness is doubled, the probability of tunneling is reduced by a factor of e^2, which is approximately 0.04%.

An Electron Has a 2% Probability of Tunneling Through a Rectangular