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Doppler Effect
moving source of waves is moving with respect to an observer; o
Apparent Upward Shift in Frequency
occurs when the observe and source are approaching
Apparent Downward Shift in Frequency
occurs when observer and source are receding
Large Distance
waves can be spread apart
Small Distance
waves must be compressed
low
Source moving away from the observer are perceived as ____ pitch
Travelling Waves
observed when a wave is not confined to a given space; the most common example is an ocean wave
Standing Waves
observed wave patterns characterized by points that appear to be standing still
