Assertion: doppler effect | /r/HasProperty | redshift
Facets:
value: for receding objects
type: PURPOSE
Source sentences:
text: The Doppler effect is a redshift for receding objects and a blueshift for approaching objects.
text: The velocities of distant galaxies are measured using the Doppler effect (the red shift).
text: Note that this is extremely fast (about 3.5 million miles per hour) and that even though the Doppler shift is called a “red” shift, this shifted light would still appear yellow to your eyes.