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Statement of a problem № 3484

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Two wires of different densities are joined as in Fig. 8.2. An incident wave y1 = A1 sin(wt-k1x ) travelling in the positive x-direction along the wire at the boundary is partly transmitted. (a) Find the reflected and transmitted amplitudes in terms of the incident amplitude. (b) When will the amplitude of the reflected wave be negative?

Solution:
Two wires of different densities are joined as in Fig. 8.2. An incident wave y1

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