Doppler effect, Definition, Example, & Facts
Par un écrivain mystérieux
Description
Doppler effect, the apparent difference between the frequency at which sound or light waves leave a source and that at which they reach an observer, caused by relative motion of the observer and the wave source. It was first described (1842) by the Austrian physicist Christian Doppler.
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Doppler Effect - Definition, Formula, Examples, Uses, FAQs
![Doppler effect, Definition, Example, & Facts](https://www.grc.nasa.gov/www/k-12/airplane/Images/doppler.gif)
Doppler Effect
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