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The ω-frequency monochromatic plane wave passes through from a medium having a dielectric constant ε1 to...

The ω-frequency monochromatic plane wave passes through from a medium having a dielectric constant ε1 to a similar to the first medium, but with a dielectric constant ε2, in the normal direction of the medium.
a) Determine the boundary conditions at the interface of the medium for electric and magnetic fields.
b) Find the energy ratio from the first medium to the second medium.

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