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Dopler\'s effect? Please |
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Answer» Wellcome a written THANK YOU for you It is named after the Austrian physicist Christian Doppler, who described the phenomenon in 1842.A common example of Doppler shift is the change of pitch heard when a vehicle sounding a horn approaches and recedes from an observer. Compared to the emitted frequency, the received frequency is higher during the approach, identical at the instant of passing by, and lower during the recession. The Doppler effect is the change in frequency or wavelength of a wave in relation to an observer who is moving relative to the wave source. |
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