Doppler effect
noun
noun ·Rare ·Advanced level
Definitions
Noun
- 1 The apparent change in frequency or wavelength of a wave that is perceived by an observer moving relative to the source of the waves.
"Along the street, a delivery van’s pop music approaches and recedes with a faint Doppler effect, the cheerless band lifting and dipping a microtone."
- 2 change in the apparent frequency of a wave as observer and source move toward or away from each other wordnet
Example
More examples"Along the street, a delivery van’s pop music approaches and recedes with a faint Doppler effect, the cheerless band lifting and dipping a microtone."
Etymology
From Christian Andreas Doppler, the scientist who first proposed this effect.