doppler effect
dopp
ˈdɒp
dop
ler
e
ɪ
i
ffect
fɛkt
fekt

Definition & Meaning of "doppler effect"in English

Doppler effect
01

the change in frequency or wavelength of a wave in relation to an observer who is moving relative to the source of the wave, producing a shift in pitch or color 

Grammatical Information
Animacy status
Abstract
Composition
Compound
Uncountable
Examples
The Doppler effect explains why the pitch of an ambulance siren changes as it approaches and then passes by. 
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