- #1
spikethecake
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Hi, this is my first time posting on these forums but I've been reading them for a while.
I was having a look at metamaterials and it mentioned that metamaterials had negative permittivity and negative permeability. I also found that metals naturally had negative permittivity; though I am still unsure whether this is always the case or just at certain frequencies.
I'd also like to ask why this occurs and what it means exactly; by being negative, is the field refracted in the opposite direction?
Thanks :)
I was having a look at metamaterials and it mentioned that metamaterials had negative permittivity and negative permeability. I also found that metals naturally had negative permittivity; though I am still unsure whether this is always the case or just at certain frequencies.
I'd also like to ask why this occurs and what it means exactly; by being negative, is the field refracted in the opposite direction?
Thanks :)