2007-03-09 12:41:15 · 5 answers · asked by wencar29 1 in Science & Mathematics ➔ Astronomy & Space
The Doppler effect, named after Christian Doppler, is the 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 of 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. So---check out ripples from a stone thrown in water, glass windows shattering from a jet breaking the sound barrier and a Tsunami generated by an earthquake.
2007-03-09 12:46:47 · answer #1 · answered by Faerie loue 5 · 0⤊ 0⤋
It can be used to detemine the speed a body in space is moving; whether it is moving towards or away from us; sometimes the composition of the body.
This third application is a complex understanding of the colour shift in Doppler, and the variations caused by different chemical compositions.
2007-03-09 23:17:15 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Doppler radar for profiling wind speed and direction in storms, police radar for dishing out tickets, astronomical studies of binary stars and studies to find exo-planets by measuring minute wobbles in stars via the Doppler effect.
2007-03-09 21:09:40 · answer #3 · answered by SAN 5 · 0⤊ 0⤋
doppler ultrasound
http://en.wikipedia.org/wiki/Doppler_ultrasound#Doppler_sonography often used to diagnose cardiovascular diseases.
doppler radar
http://en.wikipedia.org/wiki/Doppler_radar those pesky cops!!
doppler broadening
http://en.wikipedia.org/wiki/Doppler_broadening used to measure temperatures of gases, particularly those that are inaccessible.
2007-03-10 00:24:14 · answer #4 · answered by arbiter007 6 · 0⤊ 0⤋
You can use it to calculate the rate of Universe expansion.
2007-03-09 20:46:36 · answer #5 · answered by Anonymous · 0⤊ 0⤋