Doppler effect

Definition

A change in the observed frequency and wavelength of waves caused by motion of the wave source relative to an observer.

Used by Edexcel

Specification 7.11P · Paper 1

The wavefronts are closer together in front of the source and further apart behind it. This change in the frequency and wavelength observed because of relative motion is the Doppler effect.
Revise: Doppler Effect

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GCSE Physics · key term

A change in the observed frequency and wavelength of waves caused by motion of the wave source relative to an observer.

Used by Edexcel

Specification 7.11P · Paper 1

The wavefronts are closer together in front of the source and further apart behind it. This change in the frequency and wavelength observed because of relative motion is the Doppler effect.
Revise: Doppler Effect

Create a free account to read GCSE Physics revision notes for your exam board and track your progress.