Question: In Figure 12.5, let regions 2 and 3 both be of quarter-wave thickness. Region 4 is glass, having refractive index, n 4 = 1.45; region

In Figure 12.5, let regions 2 and 3 both be of quarter-wave thickness. Region 4 is glass, having refractive index, n4= 1.45; region 1 is air.

74 N3 N2 Nin,b Nin,a Incident energy -1, (*1 +


(a) Find ηin,b.

(b) Find ηin,a.

(c) Specify a relation between the four intrinsic impedances that will enable total transmission of waves incident from the left into region 4.

(d) Specify refractive index values for regions 2 and 3 that will accomplish the condition of part (c).

(e) Find the fraction of incident power transmitted if the two layers were of half-wave thickness instead of quarter wave.

74 N3 N2 Nin,b Nin,a Incident energy -1, (*1 + "1)

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