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Doppler effect
(redirected from Doppler)

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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
 
While only single-Doppler radar measurements were available, there were sufficient details in reflectivity and Doppler velocity features to provide interesting deductions about the interactions.
Interpretation of single-Doppler radar signatures in a V-shaped ... by Torgerson, Kathleen L. / National Weather Digest
That's the ``Live Doppler 7,000+,'' the $1 million state-of-the-art radar tower that KABC (Channel 7) built to give its viewers real-time weather reports.
RADAR VISION WEATHERMEN GO HIGH-TECH by Daily News (Los Angeles, CA)
The Swing Speed Radar is a microwave Doppler radar velocity sensor that helps assist players in developing and optimizing their swing speed by providing a convenient real-time measure of their swing velocity.
Swing Speed indicator by Coach and Athletic Director
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