# Homework Help: Barrier potential representation

1. May 28, 2010

### PhysicalProof

Having trouble drawing the wave representations for this diagram.

[PLAIN]http://img156.imageshack.us/img156/94/diag.png [Broken]

I'm not sure what the incident and reflected waves should look like.

The question is asking to draw the waves in each region. I understand how to calculate the waves just not how to represent them.

Any help appreciated thanks.

EDIT: I also understand that the wavelength must be smaller in the middle. What I'm unsure of is where exactly to draw the reflected waves.

Last edited by a moderator: May 4, 2017
2. May 28, 2010

### vela

Staff Emeritus
Reflections occur when there's a change in the potential, so there are two places a reflection can occur.

3. May 30, 2010

### PhysicalProof

Yes but how do I depict these reflections? Are they above or below the waves at E ?

4. May 30, 2010

### vela

Staff Emeritus
They're at E. They have the same total energy as the incident wave.