The Doppler Effect.

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Presentation transcript:

The Doppler Effect

The perceived change in wavelength of a wave that is produced by a source that is moving away or toward a source.

In Astronomy , the Doppler effect is used to: Determine whether a star or other body in space is moving away or toward Earth. A star that is moving away appears redder (longer wavelength). A star moving towards Earth appears blue (shorter wavelength)

Briefly summarize the relationship between Doppler shift and the speed of a moving object. What can you infer about a star that exhibits a red shift in its spectra?