Doppler effect - Simple English Wikipedia, the free encyclopedia

# Doppler effect

### From Simple English Wikipedia, the free encyclopedia

Waves caused by a moving object cause a doppler effect

doppler effect is a change in frequency and wavelength of a wave. It is caused by the change in distance between the thing creating the wave and whatever is measuring, seeing or hearing the wave.

## [edit] Effects of changes in distance

As the distance gets smaller, the wavelength gets shorter and the frequency gets higher.

- For light, this causes a shift in color towards the blue end of the spectrum.
- For sound, this causes the sound to become higher in pitch

As the distance get longer the frequency gets lower and the wavelength gets longer.

- For light, this causes a shift towards the red end of the spectrum.
- For sound, this causes the sound to become lower in pitch.

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Category: Wave physics

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