What Is the Relative Permittivity of Gold?

What Is the Relative Permittivity of Gold?

The relative permittivity of gold is 6.9. Relative permittivity is the ratio of the dielectric permittivity of a material to the permittivity of a vacuum, and therefore has no units.

The relative permittivity of a material is also known as the material's dielectric constant. If the material is used as the dielectric material in a capacitor, then the material's relative permittivity is the ratio of the capacitance of such a capacitor to the capacitance of an otherwise identical capacitor that used a vacuum as its dielectric material. Relative permittivity is often represented by the Greek letter epsilon or an uppercase or lowercase letter "k."