Question: If the plate in Fig. 9.27 is glass in air, show that the amplitudes of E 1r , E 2r , and E 3r are,

If the plate in Fig. 9.27 is glass in air, show that the amplitudes of E_1r, E_2r, and E_3rare, respectively, 0.2E_0i, 0.192E_0i, and 0.008E_0i, where E_0iis the incident amplitude. Make use of the Fresnel coefficients at normal incidence, assuming no absorption. You might repeat the calculation for a water film in air.

Fig. 9.27 (a) Film (b) Film

(a) Film (b) Film

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