Doppler
Encyclopedia
Doppler effect and its applications
- Doppler effectDoppler effectThe Doppler effect , named after Austrian physicist Christian Doppler who proposed it in 1842 in Prague, is the change in frequency of a wave for an observer moving relative to the source of the wave. It is commonly heard when a vehicle sounding a siren or horn approaches, passes, and recedes from...
- Doppler beaming
- Doppler broadeningDoppler broadeningIn atomic physics, Doppler broadening is the broadening of spectral lines due to the Doppler effect caused by a distribution of velocities of atoms or molecules. Different velocities of the emitting particles result in different shifts, the cumulative effect of which is the line broadening.The...
- Doppler coolingDoppler coolingDoppler cooling is a mechanism that can be used to trap and cool atoms. The term is sometimes used synonymously with laser cooling, though laser cooling includes other techniques.-History:...
- Doppler cooling limitDoppler cooling limitDoppler temperature is the minimum temperature achievable with Doppler cooling, one of the methods of laser cooling.When a photon is absorbed by an atom moving in the opposite direction, its velocity is decreased according to the laws of momentum conservation. Accordingly, when a photon is emitted...
- Doppler cooling limit
- Doppler echocardiographyDoppler echocardiographyDoppler echocardiography is a procedure which uses ultrasound technology to examine the heart. An echocardiogram uses high frequency sound waves to create an image of the heart while the use of Doppler technology allows determination the speed and direction of blood flow by utilizing the Doppler...
- Doppler ultrasound, also called Doppler sonography
- Transcranial dopplerTranscranial dopplerTranscranial Doppler is a test that measures the velocity of blood flow through the brain's blood vessels. Used to help in the diagnosis of emboli, stenosis, vasospasm from a subarachnoid hemorrhage , and other problems, this relatively quick and inexpensive test is growing in popularity in the...
- Doppler fetal monitorDoppler fetal monitorInvented in 1958 by Dr. Edward H. Hon a Doppler fetal monitor or Doppler fetal heart rate monitor is a hand-held ultrasound transducer used to detect the heart beat of a fetus for prenatal care. It uses the Doppler effect to provide an audible simulation of the heart beat. Some models also...
- Doppler LIDAR
- Doppler On WheelsDoppler On WheelsDoppler On Wheels is a fleet of radar trucks maintained by the Center for Severe Weather Research led by Joshua Wurman, with the funding mainly provided by the National Science Foundation...
- Doppler radarDoppler radarA Doppler radar is a specialized radar that makes use of the Doppler effect to produce velocity data about objects at a distance. It does this by beaming a microwave signal towards a desired target and listening for its reflection, then analyzing how the frequency of the returned signal has been...
- Doppler spectroscopyDoppler spectroscopyDoppler spectroscopy, also known as radial velocity measurement, is a spectroscopic method for finding extrasolar planets. It involves the observation of Doppler shifts in the spectrum of the star around which the planet orbits....
- Doppler weather radar
- Laser Doppler velocimetryLaser Doppler velocimetryLaser Doppler Velocimetry , also known as Laser Doppler Anemometry , is the technique of using the Doppler shift in a laser beam to measure the velocity in transparent or semi-transparent fluid flows, or the linear or vibratory motion of opaque, reflecting, surfaces.-Technology origin:With the...
- Laser Doppler vibrometerLaser Doppler VibrometerA laser Doppler vibrometer is a scientific instrument that is used to make non-contact vibration measurements of a surface. The laser beam from the LDV is directed at the surface of interest, and the vibration amplitude and frequency are extracted from the Doppler shift of the laser beam...
- Photoacoustic Doppler effectPhotoacoustic Doppler effectThe photoacoustic Doppler effect, as its name implies, is one specific kind of Doppler effect, which occurs when an intensity modulated light wave induces a photoacoustic wave on moving particles with a specific frequency. The observed frequency shift is a good indicator of the velocity of the...
- Photon Doppler velocimetryPhoton Doppler velocimetryPhoton Doppler velocimetry is a one-dimensional Fourier transform analysis of a heterodyne laser interferometry. It was developed at Lawrence Livermore National Laboratory by Strand. In recent years PDV has achieved popularity in the shock physics community as an adjunct or replacement for VISAR...
- Pulse-Doppler radarPulse-doppler radarPulse-Doppler is a 4D radar system capable of detecting both target 3D location as well as measuring radial velocity . It uses the Doppler effect to avoid overloading computers and operators as well as to reduce power consumption...
- Relativistic Doppler effectRelativistic Doppler effectThe relativistic Doppler effect is the change in frequency of light, caused by the relative motion of the source and the observer , when taking into account effects described by the special theory of relativity.The relativistic Doppler effect is different from the non-relativistic Doppler effect...
People
- Árpád DopplerÁrpád DopplerÁrpád Doppler was a Hungarian-German composer.He was born in Budapest, the son of Karl Doppler and he studied at the Conservatory of Stuttgart. From 1880 to 1883 he was a teacher at the Grand Conservatory in New York City, after which he taught at the Conservatory in Stuttgart. From 1889, he was...
(1857–1927), Hungarian composer, son of Karl Doppler - Clemens DopplerClemens DopplerClemens Doppler is a beach volleyball player from Austria.He and team mate Peter Gartmayer represented Austria at the 2008 Summer Olympics in Beijing, China...
(born 1980), a beach volleyball player from Austria - Christian DopplerChristian DopplerChristian Andreas Doppler was an Austrian mathematician and physicist.-Life and work:Christian Doppler was raised in Salzburg, Austria, the son of a stonemason. Doppler could not work in his father's business because of his generally weak physical condition...
(1803–1853), who discovered the Doppler effect - Franz DopplerFranz DopplerAlbert Franz Doppler , was a flute virtuoso and a composer best known for his flute music. He also wrote one German and several Hungarian operas for Budapest, all produced with great success. His ballet music was popular during his lifetime.-Life:Doppler was born in Lemberg...
(1821–1883), composer, brother of Karl Doppler - Karl DopplerKarl DopplerKarl Doppler was a Hungarian flute virtuoso, conductor, music director, composer. He was the younger brother of the composer Franz Doppler and father of the composer Árpád Doppler....
(1825–1900), composer, flute player, brother of Franz Doppler, father of Árpád Doppler
Other
- 3905 Doppler3905 Doppler3905 Doppler is a main-belt asteroid discovered on August 28, 1984 by A. Mrkos at Klet and named for Christian Doppler.- External links :*...
, a main-belt asteroid named after Christian Doppler - Doppler (crater)Doppler (crater)Doppler is a lunar impact crater named for Christian Doppler that is located at the southern edge of the walled plain Korolev, on the far side of the Moon. To the east are the craters Das and Galois. Farther to the southwest of Doppler is Mohorovičić....
, a lunar impact crater named for Christian Doppler - Doppler, the mascot of the WNBA's Seattle StormSeattle StormThe Seattle Storm is a professional basketball team based in Seattle, Washington, playing in the Western Conference in the Women's National Basketball Association . The team was founded before the 2000 season began...
- Dr. Doppler, the villain from Mega Man X3