| Webster's Online Dictionary |
| Part of Speech | Definition | |
| Noun | 1. Austrian physicist famous for his discovery of the Doppler effect (1803-1853).[Wordnet]. | |
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Source: WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. |
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Date "Doppler" was first used in popular English literature: sometime before 1848. (references) |
| Domain | Definition | ||
| Mining | A self-contained electronic system that makes use of Doppler's principle of frequency shift of waves emanating from a moving source. In this system, a pulsed or continuous wave is sent diagonally downward fore and aft, forward and backward, and the frequencies are compared in order to obtain the true ground speed. The heading is obtained from a special magnetic compass and is maintained by a directional gyro used as an integrating device. The distance thus determined has a precision better than one part in a thousand, which is sufficient for most geophysical surveys. (references) | ||
| Transportation | Change in frequency with which energy reaches a receiver when it is in relative motion to the receiver and the energy source. Source: European Union. (references) | ||
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Source: compiled by the editor from various references; see credits. | Top | ||
| Expressions | Definition | ||
| Árpád Doppler | Árpád Doppler (June 5 1867 in Budapest-August 13 1927 in Stuttgart) was a Hungarian-German composer. (references) | ||
| Christian Johann Doppler | Austrian physicist famous for his discovery of the Doppler effect (1803-1853). Source: Wordnet 3.0 Copyright © 2006 by Princeton University. All rights reserved. | ||
| Doppler (crater) | Doppler is a lunar impact crater that is located at the southern edge of the Korolev basin, on the far side of the Moon. To the east is the Das and Galois crater formation. Further to the southwest of Doppler is the Mohorovičić crater. (references) | ||
| Doppler broadening | In Atomic physics, Doppler broadening is the broadening of spectral lines due to the Doppler effect in which the thermal movement of atoms or molecules shifts the apparent frequency of each emitter. The many different velocities of the emitting gas results in many small shifts, the cumulative effect of which is to broaden the line. The broadening is dependent only on the wavelength of the line, the mass of the emitting particle and the temperature, and can therefore be a very useful method for measuring the temperature of an emitting gas. (references) | ||
| Doppler effect | Change in the apparent frequency of a wave as observer and source move toward or away from each other. Source: Wordnet 3.0 Copyright © 2006 by Princeton University. All rights reserved. | ||
| Doppler equations | For acoustic effects concerning sound, the form of the Doppler equations depends partly on the state of motion of the sound medium (usually air) relative to the source and detector. (references) | ||
| Doppler profile | In spectroscopy, the Doppler profile is a spectral line profile which results from the thermal motion of the emitting atom or molecule. When thermal motion causes a particle to move towards the observer, the emitted radiation will be shifted to a higher frequency. Likewise, when the emitter moves away, the frequency will be lowered. (references) | ||
| Doppler radar | Radar that uses the Doppler shift to measure velocity. Source: Wordnet 3.0 Copyright © 2006 by Princeton University. All rights reserved. | ||
| Doppler shift | Change in the apparent frequency of a wave as observer and source move toward or away from each other. Source: Wordnet 3.0 Copyright © 2006 by Princeton University. All rights reserved. | ||
| Doppler temperature | Doppler temperature is the minimum achievable temperature with Doppler cooling, one of the methods of laser cooling. (references) | ||
| False Doppler | False Doppler is a term invented by Eric Baird (a Wikipedia contributor) based on a misunderstanding of a comment appearing in an essay written by Oliver Lodge in 1909. It refers to the actual Doppler effect that occurs when the distance between emitter and receiver is increasing but the incoming signal is perpendicular to the receiver's path with respect to the receiver's rest frame. The term is not used anywhere except in this Wikipedia article. (references) | ||
| Inverse Doppler effect | While the usual Doppler effect means that the frequency increases if the observer approaches the source - and decreases as they move away from each other - the theorists have speculated, since 1943, about the possibility that these rules may be interchanged. That would create an inverse Doppler effect. (references) | ||
| Laser Doppler velocimetry | Laser Doppler velocimetry (LDV, also known as laser Doppler anemometry, or LDA) is a technique for measuring the direction and speed of fluids like air and water. In its simplest form, LDV crosses two beams of collimated, monochromatic light in the flow of the fluid being measured. A microscopic pattern of bright and dark stripes forms in the intersection volume. Small particles in the flow pass through this pattern and reflect light towards a detector, with a characteristic frequency indicating the velocity of the particle passing through the probe volume. (references) | ||
| Relativistic Doppler effect | In physics, the relativistic Doppler effect is change in the observed frequency of light due to the relative motion of source and observer when taking into account the Special Theory of Relativity. (references) | ||
| Transverse Doppler effect | In special relativity, the transverse Doppler effect is the nominal redshift component associated with transverse (i.e. non-longitudinal) motion, and is important both theoretically and experimentally. (references) | ||
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Source: compiled by the editor from various references; see credits. | Top | ||
| Expressions | Domain | Definition | |
| Audible Doppler enhancer | Electrical Engineering | The observation of the envelope that modulates the amplitude of the received pulses by means of aural reception after passage through a so-called third detector, which recovers the envelope from the pulses. Source: European Union. (references) | |
| Doppler (frequency) | Aerospace | Shift in frequency caused by relative motion along the line of sight between the sensor and the observed scene. (references) | |
| Doppler averaged cross-section | Physics | Cross-section averaged over energy, employing appropriate weighting factors, to take into account the effect of thermal motion of the target particles such that the product of the average cross-section so obtained and the flux density in the laboratory system gives the correct reaction rate. Source: European Union. (references) | |
| Doppler Bandwidth | Space | Doppler bandwidth is a measure of the spread in Doppler frequencies over the phase history. Doppler frequency is the (time) derivative of the phase history generated by a coherent radar as it passes an illuminated scatterer. Doppler bandwidth is a measure of the spread in Doppler frequencies over the phase history. The reciprocal of Doppler bandwidth is equal to the available azimuth resolution (in seconds), which usually is converted to spatial azimuth resolution through multiplication by the beam velocity. (references) | |
| Doppler broadening | Aerospace | The broadening of either an emission line or an absorption line due to random motions of molecules of the gas that is emitting or absorbing the radiant energy. See pressure broadening. In the case of an emitting gas, for example, those molecules which are approaching the observer as they emit quanta of radiant energy will, because of the Doppler effect, appear to send out a train of waves of slightly shorter wavelength than that characteristic of a stationary molecule, while receding molecules will appear to emit slightly longer wavelengths. The net effect, averaged over many molecules, is to superimpose, on the natural line width, a bell-shaped broadening that is proportional to the square root of the absolute temperature of the gas. (references) | |
| Doppler Broadening | Physics | Frequency spreading which causes broadening of single-frequency radiation (e.g., spectral lines) when the radiating bodies (atoms, molecules, etc.) have different velocities. Radiation from each individual radiating body has a different Doppler shift, and the collection of radiations at different frequencies broadens the peak of the line in an intensity-vs-frequency plot. (references) | |
| Doppler coefficient | Energy | Another name used for the fuel temperature coefficient of reactivity. (references) | |
| Doppler data | Electrical Engineering | The data of a method that is used for the determination of the radial component of the relative velocity between a source of electromagnetic waves and another object from a measurement of the difference in frequency that occurs between the radio waves that are emitted from the source and the waves that are reflected from the object. Source: European Union. (references) | |
| Doppler dilemma | Weather | The interdependence of maximum unambiguous range and maximum unambiguous velocity on the pulse repetition frequency, PRF. As PRF is increased (decreased), the range of unambiguous velocities increases (decreases), but the unambiguous range decrease (increases). Vmax * Rmax = c * l / 8, where Vmax is maximum unambiguous velocity, Rmax is maximum unambiguous range, c is speed of light, and l is wavelength. (references) | |
| Doppler effect | Aerospace | 1: The change in wavelength of radiation due to relative radial motion of source and observer. (references) | |
| 2: An observer receives sound and light from bodies moving away from her with lower frequency and longer wavelength than emitted (see Redshift) and from bodies moving toward her with higher frequency and shorter wavelength. The shift in frequency increases as the speed of the body increases. (references) | |||
| 3: A change in the observed frequency of a wave, as of sound or light, occurring when the source and observer are in motion relative to each other, with the frequency increasing when the source and observer approach each other and decreasing when they move apart. The motion of the source causes a real shift in frequency of the wave, while the motion of the observer produces only an apparent shift in frequency. (references) | |||
| 4: The change in frequency with which energy reaches a receiver when the receiver and the energy source are in motion relative to each other. Also called Doppler shift. In the case of sound, or any other wave motion where a real medium of propagation exists (excepting, therefore, light and other electromagnetic radiations) one must distinguish two principal cases: If the source is in motion with speed v relative to a medium which propagates the waves in question at speed c, then the resting observer receives waves emitted, with actual frequency f as if they had a frequency f' given by the Doppler equation f ' = f/[1 � (v/c)] where the positive sign refers to the case of the source receding from the observer, and the vice versa for the negative sign. If, on the other hand, the source is at rest relative to the propagating medium while the observer moves with speed v relative to the source, f ' = f '[1� (v/c)]where the positive sign now refers to the case of observer approaching the source. For electromagnetic radiation, f/f ' = [1 (v/c)]/[1 � (v/c)] where the top signs represent the source receding from the observer and the bottom signs, approaching the observer. (references) | |||
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Source: compiled by the editor from various references; see credits. | Top | ||
Extended Definition: DopplerDopplerDoppler can refer to: Doppler effect and its applications
Persons
Other
Source: adapted by the editor from Wikipedia, the free encyclopedia; from the article "Doppler". Image Credit. |
| Language | Translations (or nearest inflections or synonyms, in parentheses) | |||
| Al Arabiya | حملة دوبلر الاسكندنافية للرصد (Scandinavian Doppler observation campaign), حملة دوبلر الأوروبية (European Doppler campaign), طريقة دوبلر لتحديد المواقع بواسطة الساتل (Doppler satellite positioning), تسجيل دوبلر المداري والتحديد الإشعاعي للأوضاع متكاملين بواسطة الساتل (Doppler orbitography and radio positioning integrated by satellite), جهاز دوبلر لقياس التداخل بالليزر (Doppler laser interferometer), محددات دوبلر الصوتية لقياس التيار (acoustic Doppler current profiler), زحزحة دوبلر (Doppler shift), مفعول دوبلر (Doppler effect). Additional references: Al Arabiya, Saudi Arabia, Algeria, Doppler. (volunteer & more translations) | |||
| Al Fus-Ha | حملة دوبلر الاسكندنافية للرصد (Scandinavian Doppler observation campaign), حملة دوبلر الأوروبية (European Doppler campaign), طريقة دوبلر لتحديد المواقع بواسطة الساتل (Doppler satellite positioning), تسجيل دوبلر المداري والتحديد الإشعاعي للأوضاع متكاملين بواسطة الساتل (Doppler orbitography and radio positioning integrated by satellite), جهاز دوبلر لقياس التداخل بالليزر (Doppler laser interferometer), محددات دوبلر الصوتية لقياس التيار (acoustic Doppler current profiler), زحزحة دوبلر (Doppler shift), مفعول دوبلر (Doppler effect). Additional references: Al Fus-Ha, Saudi Arabia, Algeria, Doppler. (volunteer & more translations) | |||
| Arabic | حملة دوبلر الاسكندنافية للرصد (Scandinavian Doppler observation campaign), حملة دوبلر الأوروبية (European Doppler campaign), طريقة دوبلر لتحديد المواقع بواسطة الساتل (Doppler satellite positioning), تسجيل دوبلر المداري والتحديد الإشعاعي للأوضاع متكاملين بواسطة الساتل (Doppler orbitography and radio positioning integrated by satellite), جهاز دوبلر لقياس التداخل بالليزر (Doppler laser interferometer), محددات دوبلر الصوتية لقياس التيار (acoustic Doppler current profiler), زحزحة دوبلر (Doppler shift), مفعول دوبلر (Doppler effect). Additional references: Arabic, Saudi Arabia, Algeria, Doppler. (volunteer & more translations) | |||
| Bahasa Indonesia | Efek Doppler (Doppler effect, Relativistic Doppler effect). Additional references: Bahasa Indonesia, Indonesia, Java, Doppler. (volunteer & more translations) | |||
| Bohemian | dopler (Doppler, ultrasonography), CTG (doppler). Additional references: Bohemian, Czech Republic, Doppler. (volunteer & more translations) | |||
| Brazilian Portuguese | doppler (Doppler, Doppler shift). Additional references: Brazilian Portuguese, Portugal, Angola, Doppler. (volunteer & more translations) | |||
| Cestina | dopler (Doppler, ultrasonography), CTG (doppler). Additional references: Cestina, Czech Republic, Doppler. (volunteer & more translations) | |||
| Chinese Simplified | 多普勒 (Doppler), 都普勒 (doppler), 多普勒效应 (Doppler effect, Doppler), 都普勒雷达 (doppler radar), 欧洲多普勒观测运动 (European Doppler observation campaign), 多普勒声纳导航 (Doppler navigation, Doppler sonar navigation), 多普勒卫星定位 (Doppler satellite positioning), 多普勒记录仪 (Doppler log). Additional references: Chinese Simplified, China, Brunei, Doppler. (volunteer & more translations) | |||
| Chinese Traditional | 都普勒 (doppler), 多普勒 (doppler), 都普勒雷達 (doppler radar), 都卜勒特徵 (Doppler signature), 都卜勒領航儀 (Doppler navigator), 多普勒效應 (Doppler effect), 例如紅移或藍移 (Doppler effect), 都卜勒含糊度 (Doppler ambiguity), 連續波都卜勒領航雷達 (CW radar Doppler navigator). Additional references: Chinese Traditional, China, Brunei, Doppler. (volunteer & more translations) | |||
| Czech | dopler (Doppler, ultrasonography), CTG (doppler). Additional references: Czech, Czech Republic, Doppler. (volunteer & more translations) | |||
| Deutsch | Doppler (Doppler, reproducer). Additional references: Deutsch, Germany, Austria, Doppler. (volunteer & more translations) | |||
| Français | Doppler (Doppler, Doppler shift), technique Doppler (Doppler), effet Doppler (Doppler effect, Doppler shift, Doppler). Additional references: Français, France, Algeria, Doppler. (volunteer & more translations) | |||
| French | Doppler (Doppler, Doppler shift), technique Doppler (Doppler), effet Doppler (Doppler effect, Doppler shift, Doppler). Additional references: French, France, Algeria, Doppler. (volunteer & more translations) | |||
| German | Doppler (Doppler, reproducer). Additional references: German, Germany, Austria, Doppler. (volunteer & more translations) | |||
| Greek | Ντόπλερ (Doppler, Doppler shift), φαινόμενο Ντόπλερ (Doppler, Doppler effect, Doppler shift), επίδραση Ντόπλερ (Doppler, Doppler shift). Additional references: Greek, Greece, Albania, Doppler. (volunteer & more translations) | |||
| Greek (transliteration) | ntopler (Doppler, Doppler shift), fainomeno ntopler (Doppler, Doppler effect, Doppler shift), epidhrasi ntopler (Doppler, Doppler shift). Additional references: Greek, Greece, Albania, Doppler. (volunteer & more translations) | |||
| Hanguk Mal | 도플러 효과 (Doppler effect), 펄스도풀러 (pulse Doppler), 도플러 편이 (Doppler shift), 도플러 효과를 이용한 광학식 속도계 (Doppler lidar system). Additional references: Hanguk Mal, Korea, South, Korea, Doppler. (volunteer & more translations) | |||
| Hanguohua | 도플러 효과 (Doppler effect), 펄스도풀러 (pulse Doppler), 도플러 편이 (Doppler shift), 도플러 효과를 이용한 광학식 속도계 (Doppler lidar system). Additional references: Hanguohua, Korea, South, Korea, Doppler. (volunteer & more translations) | |||
| Hebrew | אפקטדופלר (Relativistic Doppler effect), אפקט דופלר (Doppler effect), כריסטיאן אנדראס דופלר (Christian Doppler). Additional references: Hebrew, Israel, Doppler. (volunteer & more translations) | |||
| High Arabic | حملة دوبلر الاسكندنافية للرصد (Scandinavian Doppler observation campaign), حملة دوبلر الأوروبية (European Doppler campaign), طريقة دوبلر لتحديد المواقع بواسطة الساتل (Doppler satellite positioning), تسجيل دوبلر المداري والتحديد الإشعاعي للأوضاع متكاملين بواسطة الساتل (Doppler orbitography and radio positioning integrated by satellite), جهاز دوبلر لقياس التداخل بالليزر (Doppler laser interferometer), محددات دوبلر الصوتية لقياس التيار (acoustic Doppler current profiler), زحزحة دوبلر (Doppler shift), مفعول دوبلر (Doppler effect). Additional references: High Arabic, Saudi Arabia, Algeria, Doppler. (volunteer & more translations) | |||
| High German | Doppler (Doppler, reproducer). Additional references: High German, Germany, Austria, Doppler. (volunteer & more translations) | |||
| Hochdeutsch | Doppler (Doppler, reproducer). Additional references: Hochdeutsch, Germany, Austria, Doppler. (volunteer & more translations) | |||
| Indonesian | Efek Doppler (Doppler effect, Relativistic Doppler effect). Additional references: Indonesian, Indonesia, Java, Doppler. (volunteer & more translations) | |||
| Ivrit | אפקטדופלר (Relativistic Doppler effect), אפקט דופלר (Doppler effect), כריסטיאן אנדראס דופלר (Christian Doppler). Additional references: Ivrit, Israel, Doppler. (volunteer & more translations) | |||
| Japanese | ドップラー (Doppler), ドップラーレーダー (Doppler), ドプラー周波数 (Doppler frequency), ドプラーシフト (Doppler shift), ドップラー効果 (Doppler effect, Relativistic Doppler effect), ドップラー・レーダー (Doppler radar), クリスチャン・ドップラー (Christian Doppler). Additional references: Japanese, Japan, Taiwan, Doppler. (volunteer & more translations) | |||
| Korean | 도플러 효과 (Doppler effect), 펄스도풀러 (pulse Doppler), 도플러 편이 (Doppler shift), 도플러 효과를 이용한 광학식 속도계 (Doppler lidar system). Additional references: Korean, Korea, South, Korea, Doppler. (volunteer & more translations) | |||
| Portuguese | doppler (Doppler, Doppler shift). Additional references: Portuguese, Portugal, Angola, Doppler. (volunteer & more translations) | |||
| Slovak | dopplerovský (Doppler). Additional references: Slovak, Slovakia, Hungary, Doppler. (volunteer & more translations) | |||
| Slovakian | dopplerovský (Doppler). Additional references: Slovakian, Slovakia, Hungary, Doppler. (volunteer & more translations) | |||
| Spanish | con efecto doppler (Doppler), efecto Doppler (Doppler effect, Doppler shift, Doppler). Additional references: Spanish, Spain, Mexico, Doppler. (volunteer & more translations) | |||
| Turkish | Doppler kayması (Doppler shift), vb dalga frekansındaki artma ya da azalma (Doppler effect), ışık (light, gleam, lamp, bathe, beam), Doppler Ekokardiyografi (Doppler echocardiography). Additional references: Turkish, Turkey, Bulgaria, Doppler. (volunteer & more translations) | |||
| Source: Eve, based on a combination of meta analysis and graph theory (for near and back translations). | Top | |||
| Language | Translations for “Doppler” or closest synonym(s); back translations in parentheses. | |||
| Athag | Dathagopplathager (Doppler). Additional references: Athag, Doppler. (volunteer) | |||
| Double Dutch | Dagopplager (Doppler). Additional references: Double Dutch, Doppler. (volunteer) | |||
| Leet | 0|0|o|o|_£P\ (Doppler). Additional references: Leet, Doppler. (volunteer) | |||
| Oppish | Dopopploper (Doppler). Additional references: Oppish, Doppler. (volunteer) | |||
| Pig Latin | Opplerday (Doppler). Additional references: Pig Latin, Doppler. (volunteer) | |||
| Terran B | dopper (Doppler). Additional references: Terran B, Doppler. (volunteer) | |||
| Ubbi Dubbi | Duboppluber (Doppler). Additional references: Ubbi Dubbi, Doppler. (volunteer) | |||
| Source: compiled by the editor. | Top | |||
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