Show that under the condition E1p1 = E2p2 for a sound wave (see task. (Derive formulas relating the amplitude of a sound wave incident normally on the interface between two elastic media with the amplitude of the reflected and transmitted wave. Find the reflection coefficient R and the transparency coefficient T at normal incidence.)) there is no reflection (R = 0), and with g = 0 and g = there is no transmitted wave (T = 0), where g = . Index 1 refers to the medium in which the wave incident on the interface runs, index 2 refers to the medium in which

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