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What is the measurement of the velocity of moving particles the Doppler effect is based
on? Remember that you can check the theory tab on your LabPad.
a) A shift in the volume
b) A shift in the frequency of the sound
c) The Doppler effect cannot be used to measure the velocity
d) A shift in the intensity of the sound

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Doppler effect:

Doppler effect is a phenomenon observed whenever the source of the waves(light, sound) is traveling with a relative speed to an observer.

Doppler effect is observed when there is an apparent change in wavelength and a shift in frequency for the observer.

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