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Doppler effect
(redirected from Doppler-shifted)

    Also found in: Medical, Encyclopedia, Wikipedia 0.31 sec.

Doppler effect

Change in the observed frequency (or wavelength) of waves due to relative motion between the wave source and the observer. The Doppler effect is responsible for the perceived change in pitch of a siren as it approaches and then recedes, and for the red shift of light from distant galaxies. It is named after the Austrian physicist Christian Doppler.



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? Mentioned in ? References in periodicals archive
 
For close to a century, scientists have known that the wavelengths of light from a rapidly receding source in out space also get Doppler-shifted to lower frequencies and so appear redder than they would if their source remained stationary.
Expanding a theory for shifting starlight by Amato, I. / Science News
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