10.43 Show that eqs (10.67) and (10.68) are equivalent. 10.44 (a) For a normal incidence upon an interface betwen two lossless media, we define the ratios of the time-average incident, reflected, and transmitted powers as (Plom and T Prove that R + T ; that is, energy conservation holds for reflection and transmission. (b) Express Rand Tín terms of ? and Tb-
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