We did a quantum tunneling lab online. We used a Java program to model the electron wave function and show what happens when there is a step potential (U is less than E). Our value for the transmission probability had a pattern:

```
Barrier Width (nm)   T   Barrier Width (nm)    T
1.0                  0.97      6.0            0.82
2.0                  0.91      7.0            0.88
3.0                  0.84      8.0            0.95
4.0                  0.80      9.0            1.00
5.0                  0.80      10.0           0.99

```

It seems to decrease, increase, then decrease again? Why is this?