1. The Doppler Effect

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

4. 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)

5. 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?