physics 202 lecture notes - pccspot.pcc.edu/~dulrich/2013p202/2013p202ln09.pdf · physics 202,...
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Wave Interference
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When the disturbances from two sources combine the instantaneous am-plitudes add
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Reflection and refraction of waves provide a mechanical model for light andsound
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Reflection off a boundary acts as a second source that can produce standingwaves
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Three-dimensional standing waves are used to build microphones, antenna,and atoms
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Double slit experiment provides definitive evidence for the wave nature oflight
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Single slit diffraction can be understood as the interference of a series ofsingle sources
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Iridescence in nature is usually from thin-film interference
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The difference between incandescent and laser light is the coherence of thewaves
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