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doppler effect

/ˈdɒplər ɪˈfekt/

翻译: 多普勒效应是指当波源与观察者之间存在相对运动时,观察者接收到的波的频率发生变化的现象,对声波表现为音调变化,对光波则表现为颜色(频率)偏移。

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phrase

/ˈdɒplər ɪˈfekt/C1formalscientific
  • zh多普勒效应是指当波源与观察者之间存在相对运动时,观察者接收到的波的频率发生变化的现象,对声波表现为音调变化,对光波则表现为颜色(频率)偏移。

A scientific phenomenon where the frequency of waves (such as sound or light) changes for an observer moving relative to the source of the waves, causing a shift in pitch or color.

  1. Change in wave frequencyC1formal

    The change in frequency or wavelength of a wave in relation to an observer moving relative to the wave source.

    zh多普勒效应

    • The Doppler effect explains why a siren sounds higher pitched as it approaches you.
    • Astronomers use the Doppler effect to measure the speed of distant stars.
    • Radar guns rely on the Doppler effect to detect the speed of vehicles.