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Doppler effect   /dˈɑplər ɪfˈɛkt/   Listen
Doppler effect

noun
1.
Change in the apparent frequency of a wave as observer and source move toward or away from each other.  Synonym: Doppler shift.






WordNet 3.0 © 2010 Princeton University








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"Doppler effect" Quotes from Famous Books



... ceased—a big thing, surrounding the flagship Ranger like a spiderweb trapping a fly—and had kept it hopefully tuned over a wide band. The radio beam swept through, ghostly faint from dispersion, wave length doubled by Doppler effect, ragged with cosmic noise. An elaborate system of filters and amplifiers could make it no more ...
— The Burning Bridge • Poul William Anderson

... this space because of their intense gravitational fields. There are probably slight fluctuations in the field, perhaps one every minute or so. Since we were approaching them at twenty thousand times the speed of light, the Doppler effect gives us what looks like ...
— Islands of Space • John W Campbell



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