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A plane wave is incident on a dielectric slab of permittivity er and thickness d at an incidence angle θ0, where d λο/(4vRr)

A plane wave is incident on a dielectric slab of permittivity er and thickness d at an incidence angle θ0, where d λο/(4vRr) and X0 is the free-space wavelength of the incident wave, as shown in the accompanying figure. If free-space exists on both sides of the slab, find the reflection coefficient of the wave reflected from the front of the slab. Assume normal incidence now. Under what conditions the reflection is minimum? Show an illustration of the problem, with clear definition and configuration of the fields considered, any assumptions made in solving the problem. Repeat the problem for maximum transmission. Suggest some practical application where this effect can be used.
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