# Homework Help: Dielectric function

1. May 26, 2010

### ronaldoshaky

How do you work out the transmittance across two boundaries (i.e. a wall)?

Do you multiply the transmittance for one boundary by the transmittance across the other boundary?

Last edited: May 27, 2010
2. May 27, 2010

### pellman

You can assume that the incident intenstity on the second medium is the transmitted intensity from the first medium. So the answer would be "yes" but be sure you understand why.

Also I think you are using the term "boundary" with a little confusion, though that might be because I myself am not familiar with optics usage.