Show that the energy flow due to a plane electromagnetic wavepropagating along z-direction in a dielectric medium is given by7ωμ2E² cos² (kz - wt),where k and w are the propagation vector and angular frequency, E, iselectric field amplitude, u is the relative permeability of the medium.

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Show that the energy flow due to a plane electromagnetic wave propagating along z-direction in a dielectric medium is given by Ak % ωμ 2 E² cos² (kz - wt), where k and w are the propagation vector and angular frequency, Eo is electric field amplitude, u is the relative permeability of the medium.

Show that the energy flow due to a plane electromagnetic wave propagating along z-direction in a dielectric medium is given by Ak % ωμ 2 E² cos² (kz - wt), where k and w are the propagation vector and angular frequency, Eo is electric field amplitude, u is the relative permeability of the medium.