Peoples Physics Concepts

11.4. Doppler Effect http://www.ck12.org

Watch this Explanation

MEDIA

Click image to the left for use the URL below.

URL: http://www.ck12.org/flx/render/embeddedobject/308

MEDIA

Click image to the left for use the URL below.

URL: http://www.ck12.org/flx/render/embeddedobject/3611

MEDIA

Click image to the left for use the URL below.

URL: http://www.ck12.org/flx/render/embeddedobject/309

Simulation

http://www.lon-capa.org/~mmp/applist/doppler/d.htm

Explore More

1. What changes about a wave in the Doppler effect: Frequency? Wavelength? Speed? Is it correct to say that if
   an ambulance is moving towards you the speed of the sound from its siren is faster than normal? Discuss.


2. A friend plays an A note(440 Hz)on her flute while hurtling toward you in her imaginary space craft at a
   speed of 40 m/s. What frequency do you hear just before she rams into you? Assume the speed of sound to
   be 343 m/s.


3. How fast would a student playing an A note(440 Hz)have to move towards you in order for you to hear aG
   note(784 Hz)? Assume the speed of sound to be 343 m/s

Answers

1..
2. 498 Hz
3. 150 m/s