Show that, no matter how strong the 
potential,
for this potential there are always values of the incoming wave vector for
which 
and 
.
What would you expect classically for the probability of transmission
through two potentials given your
result for the probability of transmission through a single 
-function
from Problem 3?
The phenomena of the high probability of transmission through a pair of potentials which individually give very little transmission is known as resonant tunneling. Comment on what you think is the physical origin of resonant tunneling.