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L03_a - Waves transport energy Mechanical waves o...

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Waves transport energy: Mechanical waves: o propagating disturbance (from equilibrium) of medium Electromagnetic waves (i.e. light, radio, etc.): o Propagate without medium MECHANICAL WAVES (Chapter 13) Concepts to watch for: o Types of waves: transverse vs. longitudinal o Properties: speed, amplitude, period, angular frequency, wavelength, angular wave number, phase constant o sinusoidal wave o Representation of traveling wave: the wave function o Linear wave equation E B λ c
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Transverse wave: displacement from equilibrium perpendicular to direction of travel o Lateral displacement of string o Water wave Longitudinal wave: Displacement from equilibrium parallel to direction of travel o Compression of spring o Compression of fluid (air). i.e. sound wave. Can quantify disturbance: i.e. y ( x,t ) transverse displacement of cord from equilibrium at time t and location x in direction of propagation o y ( x,t ) is called the WAVE FUNCTION
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WAVE FUNCTION:
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