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Definitions

Doppler effect

[dop-ler] / ˈdɒp lər /
NOUN
red shift
Synonyms


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Due to the Doppler effect, a fire truck's siren gets higher-pitched as it travels closer and sounds lower-pitched as it drives farther away.

From Science Daily • May 23, 2024

Their speeds would be carefully calibrated to create different layers of the Doppler effect, or the bending in a note that we perceive when sound passes us by.

From New York Times • Jan. 17, 2024

Sometimes I go to sleep to the bizarre Doppler effect of planes that sound as if they’re about to crash into my house.

From Seattle Times • Jun. 9, 2023

They emit light at specific wavelengths, which the gases’ swirling motion smears into “broad emission lines” through the Doppler effect.

From Science Magazine • Apr. 25, 2023

To understand the implications of this, we must first understand the Doppler effect.

From "A Brief History of Time: And Other Essays" by Stephen Hawking