Let E = y E 0 exp[i(hz t) x] be the electric field of a

Let E = ŷ E₀ exp[i(hz − ωt) − κx] be the electric field of a wave propagating in vacuum.
(a) How are the real parameters h, κ, and ω related to one another?
(b) Find the associated magnetic field B.
(c) Under what conditions is the polarization of the magnetic field close to circular?
(d) Compute the time-averaged Poynting vector.