Recent content by Julle

http://www.random-science-tools.com/electronics/water_dielectric.htm One of many but shows the principle nicely. The dielectric constant is for most (all?) dielectric materials frequency dependent and is often written as εr=ε'-iε'' where ε' is the real part and is related to the stored...

Calculating wavelength in a media Hi Trying to get how to calculate the wavelength of an electromagnetic wave in a media and I am getting confused about the permittivity. I know the formula: vphase = c/(sqrt(εr*μr)) where vphase is the phase velocity. c is the speed of light in a...

Thanks for the answers. The link does indeed give a good explanation. I think I have what I need now.

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...

I've been looking all over the web for this stuff and I simply can't find anything that gives a proper explanation. What determines the speed of say, radio waves, in a medium? I know electromagnetic waves travel at the speed of light and as such I guess I can use the refractive index to...