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# lecture26 - Waves Waves Chapter 16 Traveling waves Chapter...

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Unformatted text preview: Waves Waves Chapter 16: Traveling waves Chapter 18: Standing waves, interference Chapter 37 & 38: Interference and diffraction of electromagnetic waves A wave is a moving pattern that moves along a medium . For example, a wave on a stretched string: The wave speed v is the speed of the pattern. Waves carry energy and momentum. v time t t +Δt Wave Motion Wave Motion Δx = v Δt The wave moves this way The particles move up and down If the particle motion is perpendicular to the direction the wave travels, the wave is called a “ transverse wave ”. Transverse waves Examples: Waves on a string; light & other electromagnetic waves. Longitudinal waves Example: sound waves in gases Even in longitudinal waves, the particle velocities are quite different from the wave velocity . The particles move back and forth. The wave moves this way Quiz Quiz wave motion A...
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lecture26 - Waves Waves Chapter 16 Traveling waves Chapter...

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