Assertion: red light's effect | /r/Synonym | the doppler effect
Facets:
value: after christian andreas doppler
type: OTHER
Source sentences:
text: This effect is called the 'Doppler effect' after Christian Andreas Doppler, an Austrian mathematician who discovered that the frequency of sound waves changes if the source of sound and the observer are moving relative to each other.
text: This sound effect was first described by Christian Andreas Doppler in the 1800s and is called the Doppler effect.