| The Doppler effect is a change in the frequency of sound waves caused by moving objects. |
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| Basically the Doppler effect is that pitch increases the closer something gets to you, and it decreases the further away it gets. |
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| Synth notes bob, bend and warble, producing a strange, droning, Doppler effect, whizzing past the listener like vehicles on a Tron superhighway. |
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| By analogy, the electromagnetic radiation emitted by a moving object also exhibits the Doppler effect. |
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| This determination assumes the variation of the redshift is indeed a Doppler effect due to motion of the star. |
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| As the 95-pound bullet whizzes past, the Doppler effect plays tricks on my ears. |
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| The inverse Doppler effect is not something you can hear, but understanding it could one day lead to important advances in optics and communications equipment. |
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| In the astronomical setting, the Doppler effect applies to light. |
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| There's a kind of Doppler effect that results: a slight increase in frequency as the decade approaches the artists. |
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| But when you're on the tracks the Doppler effect can make it hard to hear a train. |
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| The Doppler effect is one method, as this key stage 4 resource from Royal Observatory Greenwich explains. |
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| The student can gain experience in the properties of US waves, and also easily study the Doppler effect extensively used in security systems. |
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| Weather radars can use the Doppler effect to detect the motion of targets, and this motion is used in various meteorological techniques. |
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| Sound: speed of sound, production of sound, intensity, pitch and quality, Doppler effect. |
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| Modern weather radars can also evaluate the returned signal to detect target motion toward or away from the radar using the Doppler effect. |
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| Radar guns, for example use the Doppler effect to measure the speed of vehicles or other objects such as baseballs. |
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| The phase of the received signal varies with range as the sensor moves relative to the target, causing the Doppler effect. |
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| On each orbit, the planets pull the star slightly, which can be detected by the Doppler effect. |
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| Within hours they realized that, because of the Doppler effect, they could pinpoint where the satellite was along its orbit. |
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| Red shifting is caused by the Doppler effect. |
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| This change in the frequency of waves of all types which occurs when the source and observer are approaching or going away from one another is known as the Doppler effect. |
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| While conventional radars measure the position of objects using the waves that they return, continuous wave radars use the Doppler effect to measure the instantaneous speed of moving objects. |
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| The capability of sensing motion is made possible by the Doppler effect. |
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| The Doppler effect is only able to determine the relative speed of the target along the line of sight from the radar to the target. |
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| The Doppler effect is the apparent difference between the frequency of a wave leaving a source and the frequency of the wave reaching a moving observer. |
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| Using the Doppler effect and the principle of radiation pressure, a radiation pressure force can be applied to oppose the atoms' motion, thus slowing and cooling them. |
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| Examples of the Doppler effect include the easily heard drop in pitch as a train blowing its whistle or a car with its horn blowing passes by the listener. |
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| Redshift results from the Doppler effect, the same phenomenon that causes the siren on a fire truck to drop in pitch as the truck passes. |
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| Due to the Doppler effect, this radial velocity change induces a shift of the star's spectrum towards longer wavelengths as it moves away and a blueshift as it approaches. |
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| Hubble's law and the Doppler effect, observed in nearby stars, suggested that stars moving away shift toward red, and the faster the stars move away, the greater the shift. |
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| The width of a spectral line reflects velocity dispersion of the gas and shows up due to the Doppler effect caused by a distribution of the velocities of gas molecules. |
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| Acoustic Doppler Current Profiler, Doppler Current Meter, Acoustic Doppler Profiler or Acoustic Doppler Velocimeter, applies the Doppler effect to measure flow velocity. |
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| If the object is moving either toward or away from the transmitter, there is a slight equivalent change in the frequency of the radio waves, caused by the Doppler effect. |
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| That's the Doppler effect, and it also occurs for electromagnetic radiation, enabling police to catch speeders with radar guns and astronomers to determine distances to stars. |
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