Index of refraction .....permittivity? permeability? whats the formula

How do you calculate the index of refraction of a media given its properties only? I understand a wave has EM so therefore conductance and susceptibility must play a role? I believe someone told me it has to do with relative permittivity(di electric constant) and the permeability of the media as well. Makes sense, since a wave consist of both properties of energy and magnetism, there for would be effect by the absorption of either of these, but how do I formulate this, please don't post snells equation, or refraction constants.

n = sqrt(με)

from v= 1/sqrt(με), v = c/n. Medium must have zero conductivity but can be a dielectric medium, or of course a vacuum.

The index of refraction is a property of the material. If you're trying to get the index of refraction constant from the chemical equation of a particular material, you can't.

If you're trying to get the index of refraction constant from a material from its density or opacity, you can't. They are not deterministically related. Materials with higher density tend to have higher refractive indexes, but there is not a deterministic relation between the two. Dielectric constant and permeability are also not deterministically related to the index of refraction.

The only thing you can measure about a substance that will tell you the index of refraction (other than the index of refraction) is the speed of light in that material.

Speed of light is constant in a vacuum, but it is different in different materials.

i think i can help you with index of refraction,the formula is: sine of angle of incidence/sine of angle of refraction or wavelength in medium A/wavelength in medium B or velocity in medium A/velocity in medium B

The only reason franks answer is right is because there is as of yet a way to establish an invariant reference in order to formalize such a deterministic relationship.

Here try this maybe

{{n ε != 0, μ == 4/(9 n^2 ε)}}

lim_(n->±1/3/n) c/n
Let c be your particle