Question

what isdopler effect

Answer 1

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.

Answer 2

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 noticable in a passing siren ,as well as the red shift seen by astronomers.