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An explanation of Doppler shift, which occurs when the light emitted by a moving star for example changes wavelength (known as redshift or blueshift).
A short film explaining the Doppler effect in simple, easy to understand terms. Nominated for the SciCast competition.
An explanation of the Doppler effect, which occurs whenever the source of waves (eg sound) is moving with respect to an observer.
Java applet (part of a wider site) which illustrates the Doppler effect for sound, giving the example of a passing ambulance siren.
Biography of this physicist, remembered for his work on sound waves. He also conducted research on stars saying colours of stars will change depending on whether it is approaching or receding - ...
A short and simple explanation of the Doppler effect.
A good clear explanation of the Doppler Effect with diagrams.
A Marvin and Milo activity about doppler effect. All you need is a buzzing egg timer, sticky tape and a piece of string about 1m long.
Text based page describing the mathematics of a Doppler Shift for sound and light.
Equation for Doppler Shift and relativistic Doppler shift.
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