Consider a TE (s-polarized) plane wave incident at angle 1 onto a good conductor with skin depth () from a transparent dielectric with index of

Consider a TE (s-polarized) plane wave incident at angle θ1 onto a good conductor with skin depth δ(ω) from a transparent dielectric with index of refraction n1. Both materials are non-magnetic. Show that the phase of the reflected wave with respect to the incident wave is approximately