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3. Consider an infinitely long continuous string with linear mass density p, for x<0 and
for x>L, but density p2p for 0<x<L. If a wave train oscillating with an angular
frequency is incident from the left on the high-density section of the string, find the
reflected and transmitted intensities for various portions of the string. Find a value of
L that allows a maximum transmission through the high-density section.

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