The electromagnetic properties of most common materials in most common applications can be quantified in terms of the constitutive parameters ϵ , μ , and σ, which are the teh Permittivity, Permeabi...The electromagnetic properties of most common materials in most common applications can be quantified in terms of the constitutive parameters ϵ , μ , and σ, which are the teh Permittivity, Permeability and Conductivity. These are the three constitutive parameters, which describe the effect of material in determining an electromagnetic quantity in response to a source.