Before revision: Loss tangent The loss tangent is then defined as the ratio (or angle in a complex plane) of the lossy reaction to the electric field E in the curl equation to the lossless reaction:
After revision: Solution for the electric fielf of the electromagnetic wave iswhere: ,ω is the angular frequency of the wave, andλ is the wavelength in the dielectric material.Loss tangent The loss tangent is then defined as the ratio (or angle in a complex plane) of the lossy reaction to the electric field E in the curl equation to the lossless reaction: