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Topic: Doppler effect

Related Topics

Doppler shift

Doppler shift

Doppler profile

Doppler radar

Relativistic Doppler effect

Laser Doppler velocimetry

Speed of light

Christian Doppler

Wave

Radar

Special relativity

Wave equation

Redshift

	Doppler effect – FREE Doppler effect Information \| Encyclopedia.com: Facts, Pictures, Information!
		Doppler effect change in the wavelength (or frequency) of energy in the form of waves, e.g., sound or light, as a result of motion of either the source or the receiver of the waves; the effect is named for the Austrian scientist Christian Doppler, who demonstrated the effect for sound.
		The Doppler effect in reflected radio waves is employed in radar to sense the velocity of the object under surveillance.
		The Doppler effect is responsible for the red shifts of distant galaxies, and also of quasars, and thus provides the best evidence for the expansion of the universe, as described by Hubble's law.
	www.encyclopedia.com /doc/1E1-Dopplere.html (1286 words)

	Doppler Effect - Explanation, Doppler effect in light waves
		The Doppler effect is an effect observed in light and sound waves as they move toward or away from an observer.
		Doppler effects in light were not actually observed, in fact, until the late 1860s.
		In sound, the Doppler effect is observed as a difference in the pitch of a sound.
	www.scienceclarified.com /Di-El/Doppler-Effect.html (1134 words)

	The Doppler Effect
		The net effect of the motion of the bug (the source of waves) is that the observer towards whom the bug is moving observes a frequency which is higher than 2 disturbances/second; and the observer away from whom the bug is moving observes a frequency which is less than 2 disturbances/second.
		The Doppler effect is observed whenever the source of waves is moving with respect to an observer.
		The Doppler effect is of intense interest to astronomers who use the information about the shift in frequency of electromagnetic waves produced by moving stars in our galaxy and beyond in order to derive information about those stars and galaxies.
	www.glenbrook.k12.il.us /gbssci/phys/Class/waves/u10l3d.html (746 words)

	Light - Doppler Effect
		Doppler effect is related to motion-related frequency changes of waves, and was proposed in 1842 by Australian physicist Johann Christian Doppler.
		The Doppler effect is based on the principle that the frequency of a wave is different when there is a relative motion between the source and the receiver, than it would have been had there been none.
		The Doppler effect has a major application in the field of space research and has helped scientists towards a major discovery - that the galaxies were moving away, from which the scientists have realized that the universe is expanding.
	library.thinkquest.org /C006027/html-ver/op-dop.html (444 words)

	Doppler Effect
		The Doppler effect is "an apparent change in the frequency of a wave, when the source of the wave and the observer are in motion relative to one another." This effect was first described in 1842 by Austrian mathematician and physicist, Christian Doppler.
		Doppler Radar may also be used for measuring other speeds, such as those of winds in storms and tornados.
		The belief that the universe is expanding is based in part upon observations using the Doppler effect which have shown astronomical objects to be moving apart.
	www.explorelearning.com /ELContent/gizmos/ES_Deliverable/Activities/ES_SUP_ACT_Doppler1.html (573 words)

	The Doppler Effect and Sonic Booms
		His Doppler Effect is the shift in frequency and wavelength of waves which results from a source moving with respect to the medium, a receiver moving with respect to the medium, or even a moving medium.
		The Doppler effect for light waves is usually described in terms of colors rather than frequency.
		Doppler Radar uses the doppler effect for electromagetic waves to predict the weather.
	www.kettering.edu /~drussell/Demos/doppler/doppler.html (1050 words)

	Doppler Effect
		A common example of this effect is the rise and fall of the pitch of the whistle of a locomotive as it approaches and recedes from the listener.
		This phenomenon, the Doppler effect, applies to all types of waves and is named after Christian Johann Doppler, an Austrian scientist who predicted in 1842 that the color of a luminous body would change in a similar manner, due to the relative motion of the body and the observer.
		Simply stated, the Doppler effect works this way: when a source of sound approaches the listener, the waves in front of the source are crowded together so that the listener receives a larger number of waves in the same time than would have been received from a stationary source.
	www.cartage.org.lb /en/themes/Sciences/Physics/Acoustics/PhysicalCharacteristics/Dopplereffect/Dopplereffect.htm (417 words)

	The Doppler Effect and Shock Waves
		The Doppler effect is a phenomenon observed whenever the source of waves is moving with respect to an observer.
		The Doppler effect is a shift in the apparent or observed frequency and not a shift in the actual frequency at which the source vibrates.
		The Doppler effect is observed whenever the speed of the source is moving slower than the speed of the waves.
	www.glenbrook.k12.il.us /gbssci/phys/Class/sound/u11l3b.html (1055 words)

	Doppler Distortion in loudspeakers
		The Doppler effect is generally applied to moving vehicles (etc.) and the most common explanation is that the wavefront is 'compressed' as the object approaches the listener, and 'stretched' as it heads away.
		The effect of Doppler shift in loudspeakers is believed by many to be audible, and it is (relatively) easy to measure the frequency spectrum and see sidebands that seem to show modulation consistent with frequency modulation.
		Doppler shift requires that the sound source is moving with respect to the listener, which means that the listener is either stationary, or moving at a different speed from the originating sound source.
	sound.westhost.com /doppler.htm (7400 words)

	A Question of Time: The Doppler Effect
		The Doppler effect for light is symmetric (it doesn't matter if the source is moving or the receiver), and depends only on the separation rate between the source and receiver.
		The Doppler effect is different depending on the movement of source or destination with respect to the supposedly stationary carrier.
		The effect is symmetric under SRT as well, but the effect is larger than predicted by SRT, which is why for a given Doppler effect the recession rate, and all that it implies in cosmology, is smaller than under SRT.
	aquestionoftime.com /doppler.htm (2783 words)

	The Doppler Effect and Sonic Booms
		His Doppler Effect is the shift in frequency and wavelength of waves which results from a source moving with respect to the medium, a receiver moving with respect to the medium, or even a moving medium.
		The Doppler effect for light waves is usually described in terms of colors rather than frequency.
		Doppler Radar uses the doppler effect for electromagetic waves to predict the weather.
	www.gmi.edu /~drussell/Demos/doppler/doppler.html (1050 words)

	Franklin's Forecast - Doppler Effect
		The Doppler Effect is the change in frequency of energy waves when the source of or observer of the waves is in motion.
		Specifically, Doppler RADAR transmits radio waves and uses the principles of the Doppler Effect to calculate the speed and direction of moving objects, like raindrops in a thunderstorm.
		Besides being a valuable tool for meteorologists, the Doppler Effect is also used by astronomers to calculate the distances to stars and their ages.
	sln.fi.edu /weather/radar/doppler.html (320 words)

	The Physics Classroom
		The net effect of the motion of the bug (the source of waves) is that the observer towards whom the bug is moving observes a frequency which is higher than 2 disturbances/second; and the observer away from whom the bug is moving observes a frequency which is less than 2 disturbances/second.
		The Doppler effect is observed whenever the source of waves is moving with respect to an observer.
		The Doppler effect is of intense interest to astronomers who use the information about the shift in frequency of electromagnetic waves produced by moving stars in our galaxy and beyond in order to derive information about those stars and galaxies.
	www.physicsclassroom.com /Class/waves/U10L3d.html (750 words)

	HowStuffWorks "Echo and Doppler Shift"
		Doppler shift occurs when sound is generated by, or reflected off of, a moving object.
		Doppler shift: The person behind the car hears a lower tone than the driver because the car is moving away.
		The wake forms a V shape, and the angle of the V is controlled by the speed of the boat.
	www.howstuffworks.com /radar1.htm (933 words)

	The Doppler Effect
		Doppler's prediction was tested in 1845 by the Dutch physicist Buys Ballot, who later also proposed Buys Ballot's Law by which hurricanes and other low-pressure weathr systems spin counterclockwise north of the equator, clockwise south of it.
		Here let it just be said that Doppler's guess was accurate, and his effect is used in many ways--for instance, in radar "guns" used by the police to monitor the speed of cars.
		Detecting the Doppler effect can be done by monitoring either the wavelength λ or the frequency ν;, depending on the detecting instrument, but of course the same effect is measured.
	www.phy6.org /stargaze/Sun4Adop2.htm (1756 words)

	How Radar Guns Work
		Doppler Principle states that the measured frequency of a wave is relative to the motion between the source and the observer.
		Then, the Doppler Effect is applied: the frequency of the transmitted pulse is compared to the frequency of the reflection, and speed is calculated by using the difference between the two frequencies.
		Doppler Audio is a useful tool to help the operator during the initial observation and identification of the target vehicle.
	www.radarguns.com /how-radar-guns-work.html (1094 words)

	The Doppler Effect
		This principle is known as the Doppler effect.
		The Doppler effect is named after the Austrian physicist, Christian Johann Doppler, who discovered it.
		The Doppler effect makes a pitch appear to change when you, or the source, are in motion.
	www.ndt-ed.org /EducationResources/HighSchool/Sound/dopplereffect.htm (380 words)

	Doppler Shift for Sound and Light
		in a material medium the Doppler frequency shift depends on whether the emitter or the absorber is moving relative to the fixed medium.
		More generally, we can give the Doppler shift for the case when the (inertial) motions of the emitter and absorber are at any specified angles relative to the "line of sight".
		This differs in appearance from the Doppler shift equation given in Einstein’s 1905 paper, but only because, in Einstein’s equation, the angle f is evaluated with respect to the emitter’s rest frame, whereas in our equation the angle is evaluated with respect to the absorber’s rest frame.
	mathpages.com /rr/s2-04/2-04.htm (1474 words)

	Doppler
		Doppler staat al jaren bekend als dé plek voor uw (zakelijke) lunch.
		Doppler beschikt over twee zeer representatieve zaalruimtes op de eerste verdieping die uitermate geschikt zijn voor uw zakelijke bespreking, vergadering of presentatie.
		Doppler is natuurlijk ook een heerlijk rustpunt tijdens een bezoek aan Vos Interieur, hét interieur- en designcentrum van Groningen.
	www.doppler.nl (128 words)

	Doppler Effect - Physics Planet .com
		Astrophysicists use the Doppler effect with respect to the electromagnetic spectrum, both the visible and invisible, as they seek to understand elements of the universe.
		The Doppler shift is used to calculate precisely how fast stars and other celestial bodies are moving toward or away from the earth.
		In terms of the Doppler Effect, it is one of the defining characteristics of a wave.
	www.physicsplanet.com /articles/doppler-effect (925 words)

	Cardiology Northwest (Site not responding. Last check: )
		The Doppler effect involves the ability of moving red blood cells to shift the frequency of reflected sound waves.
		For instance, CW Doppler evaluation of subaortic stenosis is performed by aiming the ultrasound beam through the aorta, parallel to blood flow.
		The unusual shape of the Doppler signal is due to the dynamic nature of the stenosis--it worsens throughout systole and is at its narrowest (and therefore highest blood velocity) at the very end of the systolic interval.
	www.heartvet.com /showpracfaq.cfm?FAQID=2381&Private=1 (560 words)

	Franklin's Forecast - Doppler Effect
		The Doppler Effect is the change in frequency of energy waves when the source of or observer of the waves is in motion.
		Specifically, Doppler RADAR transmits radio waves and uses the principles of the Doppler Effect to calculate the speed and direction of moving objects, like raindrops in a thunderstorm.
		Besides being a valuable tool for meteorologists, the Doppler Effect is also used by astronomers to calculate the distances to stars and their ages.
	www.fi.edu /weather/radar/doppler.html (320 words)

	Doppler Effect Experiment
		Doppler Radar measures the changes in the frequency of the signal it receives to determine the wind.
		Doppler Radar detects precipitation intensity, wind direction and speed, and provides estimates of hail size and rainfall amounts.
		Doppler Radar gives forecasters the capability of providing early detection of severe thunderstorms that may bring strong damaging winds, large hail, heavy rain, and possibly tornadoes.
	www.weatherwizkids.com /doppler_effect.htm (170 words)

	Doppler Shift for Sound and Light
		in a material medium the Doppler frequency shift depends on whether the emitter or the absorber is moving relative to the fixed medium.
		More generally, we can give the Doppler shift for the case when the (inertial) motions of the emitter and absorber are at any specified angles relative to the "line of sight".
		This differs in appearance from the Doppler shift equation given in Einstein’s 1905 paper, but only because, in Einstein’s equation, the angle f is evaluated with respect to the emitter’s rest frame, whereas in our equation the angle is evaluated with respect to the absorber’s rest frame.
	www.mathpages.com /rr/s2-04/2-04.htm (1466 words)

	Doppler effect Summary and Analysis Summary
		This Austrian physicist observed and explained the changes in pitch and frequency of sound and light waves, as well as all other types of waves, caused by the motion of moving bodies.
		Doppler ultrasonography is a noninvasive, non-x ray, painless diagnostic procedure that can detect the direction, velocity, and turbulence of blood flow.
		The Doppler effect, named after Christian Doppler, is the change in frequency and wavelength of a wave as perceived by an observer moving relative to the source of the waves.
	www.bookrags.com /Doppler_effect (263 words)

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