2007-01-31 06:48:12 · 4 answers · asked by guneet b 1 in Science & Mathematics ➔ Engineering
We're use to working with dc dielectric constants. The complex dielectric constant is associated with an insulators response to an electric filed as a function of frquency. This arises because at high frequencies, polarized materials don't respond instantly. Basically, the dielctric material varies with frequency.
http://en.wikipedia.org/wiki/Dielectric_medium#Complex_permittivity_in_dielectrics
2007-01-31 07:11:01 · answer #1 · answered by Gene 7 · 0⤊ 0⤋
The complex dielectric constant would also imply a lossless portion (the imaginary part) and a lossy portion (the real part) So the dielectric will get hot if the real part is large enough.
2007-01-31 15:56:57 · answer #2 · answered by rscanner 6 · 1⤊ 1⤋
it refers to an interaction of the optical wave with the material. It characterizes the energy exchange between the two. Usually the imaginary part is positive for loss or transfer of energy to the material and negative for gain.
LED's and lasers have - imaginary dialectric constants.
2007-01-31 18:44:32 · answer #3 · answered by rickpeet 3 · 0⤊ 0⤋
http://scienceworld.wolfram.com/physics/DielectricConstant.html
2007-01-31 15:10:24 · answer #4 · answered by DeepFriedBrain 2 · 0⤊ 0⤋