Hi I've looking into path loss for electromagnetic waves and it's quite straight forward to figure out how it works in free space by looking at the free space path loss formula (http://en.wikipedia.org/wiki/Free-space_path_loss). It has not been that easy figuring out how another medium would influence this loss. Given information about a medium, such as the complex dielectric constant, is it possible to find out the theoretical attenuation in the medium? As I figure the loss will still be subjected to the inverse square law but with an added factor multiplied on to account for the loss in the medium. Is that correct?