Doppler effect

Doppler effect
Doppler effect n a change in the frequency with which waves (as sound, light, or radio waves) from a given source reach an observer when the source and the observer are in motion with respect to each other so that the frequency increases or decreases according to the speed at which the distance is decreasing or increasing compare SHIFT (a)

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the relationship of the apparent frequency of waves, as of sound, light, and radio waves, to the relative motion of the source of the waves and the observer, the frequency increasing as the two approach each other and decreasing as they move apart.

Medical dictionary. 2011.

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  • Doppler effect — (also Doppler shift) ► NOUN Physics ▪ an increase (or decrease) in the apparent frequency of sound, light, or other waves as the source and the observer move towards (or away from) each other. ORIGIN named after the Austrian physicist Johann… …   English terms dictionary

  • Doppler effect — [däp′lər] n. [after C. Doppler (1803 53), Austrian mathematician and physicist] the apparent change of frequency of sound waves or light waves, varying with the relative velocity of the source and the observer: if the source and observer are… …   English World dictionary

  • Doppler effect — Change of wavelength caused by motion of the source. An animation illustrating how the Doppler effect causes a car engine or siren to soun …   Wikipedia

  • Doppler effect — /dop leuhr/, Physics. (often l.c.) the shift in frequency (Doppler shift) of acoustic or electromagnetic radiation emitted by a source moving relative to an observer as perceived by the observer: the shift is to higher frequencies when the source …   Universalium

  • Doppler effect —    Also known as Doppler shift. Both eponyms refer to the Austrian mathematician and physicist Christian Andreas Doppler (1803 1853), who first described the effect in or shortly before 1842. In perceptual neuroscience, they are used to denote an …   Dictionary of Hallucinations

  • Doppler effect — Doplerio efektas statusas T sritis Standartizacija ir metrologija apibrėžtis Matuojamosios spinduliuotės dažnio pokytis, atsirandantis dėl reliatyviojo judesio tarp pirminio ar antrinio šaltinio ir stebėtojo. atitikmenys: angl. Doppler effect vok …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

  • Doppler effect — Doplerio efektas statusas T sritis fizika atitikmenys: angl. Doppler effect vok. Doppler Effekt, m rus. эффект Доплера, m pranc. effet Doppler, m …   Fizikos terminų žodynas

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