(29) Wave Interference

This process is known as const ruct iv e int erf

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Unformatted text preview: s process is known as const ruct iv e int erf erence. As a more general example of wave interference, consider a superposition of two traveling waves of unequal amplitudes which again have the same wavenumber and zero phase angle, and are moving in opposite directions: that is, (381) where and . In this case, the trigonometric identities (see Appendix B) yield (382) Thus, the two waves interfere destructively at [i.e., at points where to produce a minimum wave amplitude [i.e., at points where amplitude and , and interfere constructively at to produce a maximum wave . It can be seen that the destructive interference is incomplete unless Incidentally, it is a general result that if two waves of amplitude and maximum and minimum possible values of the resulting wave amplitude are respectively. and . interfere then the and ,...
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This note was uploaded on 08/25/2013 for the course PHY 315 taught by Professor Staff during the Fall '08 term at University of Texas.

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