The constitutive parameters of copper are µ = µ0 = 4π × 10–7 (H/m), ε = ε0 ≃ (1 /36π) × 10...

The constitutive parameters of copper are µ = µ0 = 4π × 10–7 (H/m), ε = ε0 ≃ (1 /36π) × 10–9 (F/M), And σ = 5.8 × 10–7 (S/M). Assuming that these parameters are frequency independent, over what frequency range of the electromagnetic spectrum (See figure) is copper a good conductor?

Figure