The three regions shown in Fig. P contain perfect dielectrics. Fora wave in medium 1, inci...

The three regions shown in Fig. P contain perfect dielectrics. Fora wave in medium 1, incident normally upon the boundary at z = −d, what combination of εr, and d produces no reflection? Express your answers in terms of εr1, εr3 and the oscillation frequency of the wave, f.

Figure P: Dielectric layers for Problems.