The arctangent of the ratio of two of these quantities gives (*) Brewster's angle.
The complex form of this quantity includes the addition of an imaginary term for absorption loss, and this property is also equal to the square root of the product of permeability and permittivity. The Abbe number relates this value to a material's dispersion. Metamaterials with negative values for this property have the potential to cloak objects. The arctangent of the ratio of two of these quantities gives (*) Brewster's angle. It appears as the coefficient in Snell's law, which relates it to the sine of the angle of incidence. For ten points, name this value that is the ratio of the speed of light in a vacuum to that in a given medium.
The complex form of this quantity includes the addition of an imaginary term for absorption loss, and this property is also equal to the square root of the product of permeability and permittivity.
index of refraction [accept refractive index; prompt on “n”] &lt;EC&gt;