In Equation 18.10, the beat equation (when adding two traveling waves of similar frequencies) is (fi – f2 fi+f2 y = 24 27 27 Cos Here the amplitude envelop is dominated by cos 27 * (5E): , why is the beat

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In Equation 18.10, the beat equation (when adding two traveling waves of similar
frequencies) is
fi – f2
fi + f2
y = 2A cos 27
Cos 27
fi – f2
Here the amplitude envelop is dominated by cos 27
why is the beat
frequency frat = |fi - f2| and not divided by 2?
Transcribed Image Text:In Equation 18.10, the beat equation (when adding two traveling waves of similar frequencies) is fi – f2 fi + f2 y = 2A cos 27 Cos 27 fi – f2 Here the amplitude envelop is dominated by cos 27 why is the beat frequency frat = |fi - f2| and not divided by 2?
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