Question

what is Doppler effect.



the answer please ​

Answer 1

Answer:

The Doppler effect is defined as a noticeable change in the frequency of sound, light or water waves as the source and the observer move.

An example of the Doppler effect is that the frequency of the sound increases as the source moves closer to the observer.

Answer 2

❤hello mate❤

an increase (or decrease) in the frequency of sound, light, or other waves as the source and observer move towards (or away from) each other. The effect causes the sudden change in pitch noticeable in a passing siren, as well as the red shift seen by astronomers.