Question

What is Doppler Effect?
Pls give a brief note.

BEST ANSWER WILL BE MARKED BRAINLIEST!!

Answer 1

Answer:

The definition of the Doppler Effect is: the apparent difference between the frequency at which sound or light waves leave a source and that at which they reach an observer, caused by relative motion of the observer and the wave source.

Explanation:

When you are standing on the sidewalk and a car drives pass, the pitch of the sound of the car drops.

It's easier to understand when looking at this picture.

Answer 2

Answer:

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.

Explanation: