Last Updated
：2025/11/20
Doppler effect
Noun
Japanese Meaning
波源から発せられる波の周波数や波長が、観測者との相対的な動きにより見かけ上変化する現象。 / 移動する観測者が受け取る波の振動数や波長が、波源との相対運動の影響で異なって観測される現象。
（ plural ）
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The apparent change in frequency or wavelength of a wave that is perceived by an observer moving relative to the source of the waves.
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Doppler effect
The Doppler effect caused the ambulance's siren to drop in pitch as it sped past the intersection.
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The Doppler effect caused the ambulance's siren to drop in pitch as it sped past the intersection.
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