Question

The changing pitch of a police car's siren as it moves by you is an example of _____________.


Choose one answer.





a. the Doppler effect







b. intensity







c. resonance

I had C writtin down?

Answer 1

no. if it drives away from you, the tone is lower than when it approaches. this is called the doppler effect. also works for light (at higher speeds). so A is right

Answer 2

No its suppose to be the Doppler effect - is the change in frequency of a wave for an observer moving relative to the source of the wave.