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• Doppler effect - Wikipedia, the free encyclopedia

  The Doppler effect, named after Christian Doppler, is the change in frequency and wavelength of a wave as perceived by an observer moving relative to the source of the waves.

• Doppler Effect

  Expo/Science & Industry/Whispers From the Cosmos | Back | Up | Map | Glossary | Information | The Doppler Effect A Familiar Example Heard an ambulance go by recently?

• Doppler effect - Definitions from Dictionary.com

  noun Physics. (often lowercase) the shift in frequency (Doppler shift) of acoustic or electromagnetic radiation emitted by a source moving relative to an observer as ...