| 单词 | Doppler effect |
| 释义 | Doppler effect /dop"leuhr/, Physics. (often l.c.) the shift in frequency (Doppler shift) of acoustic or electromagnetic radiation emitted by a source moving relative to an observer as perceived by the observer: the shift is to higher frequencies when the source approaches and to lower frequencies when it recedes. [1900-05; named after C. J. Doppler (1803-53), Austrian physicist] |
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