Waves -Doppler effect
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9 Terms
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Doppler effect
An increase or decrease in the wavelength and frequency of a wave as the source moves relative to an observer
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f’
apparent frequency
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f
frequency emitted
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vw
speed of wave
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vs
speed of source
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+
source receding (f’<f)
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-
source approaching (f’>f)
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circular wave pattern -stationary
Waves propagate outwards in concentric circles because the speed of the waves is the same in every direction (stationary source)
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circular wave pattern -moving
waves bunch up in front, and spread out behind the moving source
Note 
Flashcards (21)