Main Question or Discussion Point
How do dielectrics affect the number of modes for standing electromagnetic waves in a box?
I suspect that it doesn't, since a dielectric shouldn't affect the null field value for standing waves at the boundaries. I just wanted to confirm if my thinking was right.What are your thoughts? How does the presence of a dielectric affect the wavelength of the EM in the metallic reflecting box?
What I mean is that I was reading that for an idealized box, that the waves have nodes at the edges of the box, but that when dielectrics are used, it can make the edge of the box "fuzzy" in regards to the wavelengths that can fit inside. I'm just trying to get a better handle on the how and why.What do you mean by "the number of"? Is there a finite number of modes? Or you mean the number density (per frequency interval, forexample)?