Assertion: doppler effect | /r/HasProperty | depend on relative motion of the source
Facets:
value: on their velocity
type: OTHER
value: on their absolute state of motion
type: OTHER
Source sentences:
text: Roughly speaking, the Doppler effect depends only on the relative motion of the source and the observer, not on their absolute state of motion (which is not a well-defined notion in physics) or on their velocity relative to the medium.