# Homework Help: Electromagnetic questions

1. Mar 12, 2005

### david90

A plane wave at a freq. of 10Ghz falls normally onto a pane slab of material of thickness 8mm. The dieletric constant of athe material is 2.5. Estimate the proportion of incident power transmitted.

I need a tip

2. Mar 13, 2005

### Davorak

Is this E&M 2?

Find the amplitude for the transmitted wave and then the time averaged pointing vector for the power transmitted.

Does this help?

3. Mar 13, 2005

### Astronuc

Staff Emeritus