# Any one help me in Refractive index and intiristic impedance of material

1. Sep 10, 2011

### efendi

Hi ....

my equations is :
1- if the refractive index of the dielectric material related with frequency ?
if yes , is that because the permittivity relation with frequency or permeability or both of them ?. also i want the equation of refractive index relation with frequency.

2- in most dielectric material mu=1 therefore we can take intiristic impedance=1/refractive index but in lossy(but not perfect) mediums we can take that ?

3- i want the equations about permittivity and permeability relation with frequency.(complex permittivity and permeability)