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A planar EM wave comes from one medium with a dielectric constant in the normal direction to another medium with a dielectric constant Both media

A planar EM wave comes from one medium with a dielectric constant 

 in the normal direction to another medium with a dielectric constant 

Both media are magnetic and non-conductive material medium. The magnetic field component of the incoming plane wave is given as followsa) Find the time expressions of the electric and magnetic field components for both environments.
b) Determine the average powers for the waves coming, reflected and transmitted.

En =9

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