What is dopler shift?

Question

Does dopler shift have something to do with sound and light?

Answer 1

Doppler effect

The change in the frequency of a wave observed at a receiver whenever the source or the receiver of the wave is moving relative to the other or to the carrier of the wave (the medium). The effect was predicted in 1842 by C. Doppler, and first verified for sound waves in 1845 from experiments conducted on a moving train.

The Doppler effect for sound waves is now a commonplace experience: If one is passed by a fast car or a plane, the pitch of its noise is considerably higher in approaching than in parting. The same phenomenon is observed if the source is at rest and the receiver is passing it. The linear optical Doppler effect was first observed in 1905 from a shift of spectral lines emitted by a beam of fast ions (canal rays) emerging from a hole in the cathode of a gas discharge tube run at high voltage. Still, their velocity was several orders of magnitude below that of light in vacuum. The precise interferometric experiments of A. A. Michelson and E. W. Morley (1887) showed clearly that the velocity of light is not bound to any ether, but is measured to be the same in any moving system. This result was a crucial check for A. Einstein's theory of special relativity (1905), which also makes a clear prediction for the optical Doppler effect.

The Doppler effect has important applications in remote-sensing, high-energy physics, astrophysics, and spectroscopy.

Let a wave from a sound source or radar source, or from a laser, be reflected from a moving object back to the source, which may itself move as well. Then a frequency shift is observed by a receiver connected to the source. The measurement provides an excellent means for the remote sensing of velocities of any kind of object, including cars, ships, planes, satellites, flows of fluids, or winds

Answer 2

The Doppler effect, named after Christian Andreas Doppler, is the apparent change in frequency and wavelength of a wave that is perceived by an observer moving relative to the source of the waves. For waves, such as sound waves, that propagate in a wave medium, the velocity of the observer and the source are reckoned relative to the medium in which the waves are transmitted. The total Doppler effect may therefore result from either motion of the source or motion of the observer. Each of these effects is analyzed separately. For waves which do not require a medium, such as light or gravity in special relativity only the relative difference in velocity between the observer and the source needs to be considered.

Answer 3

The Doppler shift has to do with the speed a wave is travelling added to the speed the producer of the wave is moving toward you. Say an ambulance has a siren blowing and is approaching you, the speed of sound is increased by the speed of the ambulance. You hear this as a rise in the pitch of the siren. The speed of a wave = wavelength times frequency. Pitch is the frequency. In light we see the shift in stars. Those moving toward us have a blue shift(increasing frequency) those moving away have a red shift.In light, color is frequency. Today Doppler is used in police RADAR to measure how fast you are going by the increase in therate of return of the RADAR beam. It is also used in weather forecasting where the RADAR beam can locate precipitation and speed of travel of storms.

Answer 4

It is the shift in frequency of a wave when the observer is moving toward or away from the source. See http://en.wikipedia.org/wiki/Doppler_effect

t applies to sound, light, water waves, etc,

Answer 5

Yes it does. Check this out.

http://www.astro.ucla.edu/~wright/doppler.htm