Thank you gomboc for your long and helpful reply!
That really improved my understanding of the overall problem. It's only the little (and probably simpler :P) steps of the problem that I'm having some trouble with at the moment, but I'll give it another good bash now.
Hi everyone, first time poster, long time reader (only because you're all so clever and I feel my contribution wouldn't be all that helpful haha).
Homework Statement
A dielectric (homogeneous, isotropic, with relative permativity \epsilon_{r}) is located in the region x<0.
An infinite line...