lecture26 - Wave Motion II Wave Motion II Sinusoidal...

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Unformatted text preview: Wave Motion II Wave Motion II Sinusoidal (harmonic) waves Energy and power in sinusoidal waves For a wave traveling in the +x direction, the displacement y is given by y (x,t) = A sin ( kx t ) with = kv A-A y x Remember: the particles in the medium move vertically. y = A sin ( kx t ) = A sin [ constant t ] = 2 f =angular frequency radians/sec f =frequency cycles/sec (Hz=hertz) The transverse displacement of a particle at a fixed location x in the medium is a sinusoidal function of time i.e., simple harmonic motion: The angular frequency of the particle motion is ; the initial phase is kx ( different for different x, that is, particles). Quiz A-A y x Shown is a picture of a travelling wave, y=A sin (kx- t), at the instant for time t=0 . a b c d e i) Which particle moves according to y=A cos ( t) ? ii) Which particle moves according to y=A sin ( t) ?...
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lecture26 - Wave Motion II Wave Motion II Sinusoidal...

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