6B Ch 15 (Official)

This is not true if frequency wavelength or amplitude

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Unformatted text preview: al Waves, General Interference • When is other than 0 or an even multiple of , the amplitude of the resultant is between 0 and 2A • But still a sinusoidal wave! (This is not true if frequency, wavelength or amplitude are not the same) Sinusoidal Waves, Summary of Interference • Constructive interference occurs when = 0, 2 , 4 – Amplitude of the resultant is 2A • Destructive interference occurs when = n where n is an odd integer – Amplitude is 0 • General interference occurs when 0< <n – Amplitude is 0 < Aresultant < 2A Standing Waves Standing Waves – the waveform • Assume two waves traveling in opposite directions in a medium with the same amplitude, frequency and wavelength • y1 = A sin (kx – t) and y2 = A sin (kx + t) • They interfere according to the superposition principle: y= 2A sinkxcos t • Standing wave, that oscillates in time Standing Waves, zeros and maxima • A node occurs at a point of zero amplitude – These correspond to positions of x where • An antinode occurs at a point of maximum displacement, 2A – These correspond to positions of x where...
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This document was uploaded on 02/21/2014 for the course CHEM 110A 110a at UCLA.

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