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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)

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

Can you offer guidance or do you also need help?

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