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Doppler effect

noun

Definitions

Noun
  1. 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. 2
    change in the apparent frequency of a wave as observer and source move toward or away from each other wordnet

Etymology

From Christian Andreas Doppler, the scientist who first proposed this effect.

See also for "doppler effect"

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