The Doppler Effect The Doppler Effect The Doppler
- Slides: 16
The Doppler Effect
The Doppler Effect
The Doppler Effect Imagine a bug jiggling its legs and bobbing up and down in the middle of a quiet puddle
Doppler Effect What would happen to the waves if the bug began to swim forward, toward B?
Doppler Effect What does that do to the frequency of the waves, in front of the bug and behind the bug? In front of the bug…the frequency ↑ Behind the bug…the frequency ↓
Animation of the Doppler Effect � http: //www. fearofphysics. com/cgibin/doppler. cgi? dir=t&vs=200&mode=wrap
If the frequency of sound changes…what also changes? Pitch…. A man’s vocal chords vibrate slower than a woman’s…hence a lower voice=lower pitch
Sound and the Doppler Effect The Doppler effect causes the changing pitch of a siren In front of the car… the pitch ↑ Behind the car… the pitch ↓
The Doppler Effect is a change in pitch…due to a change in frequency Note: The change in loudness is not the Doppler Effect! It is the shift in frequency! http: //www. youtube. com /watch? v=Y 5 Kae. CZ_Aa Y
The Doppler Effect and RADAR Police use the Doppler effect of radar waves to measure the speeds of cars on the highway
The Doppler Effect and RADAR guns 2011, Aroldis Chapman reached back and threw a pitch to Andrew Mc. Cutchen of the Pirates. The pitch wound up being high and tight, not a location necessarily to be proud of, and yet he received a standing ovation. Why the standing ovation, you may ask? The stadium radar reading displayed a velocity of 106 MPH, a speed that has only been topped twice since baseball started recording pitch velocities.
Doppler RADAR
Sheldon Cooper � http: //www. youtube. com/watch? v=Y 5 Kae. CZ_A a. Y
The Doppler Effect � Named after Christian Doppler (Austrian) 1803 -1853
Review When a source moves toward you, do you measure an increase or decrease in wave speed? Neither! It is the frequency of a wave that undergoes a change, not the wave speed.
Review How does the apparent frequency of waves change as a wave source moves? The sound waves become more frequent (compressed together). The sound waves become less frequent (stretched apart).
- Whats happening in this picture
- Decibel equation
- Doppler effect in meteorology
- Doppler effect in light
- Doppler effect
- Doppler effect bbc bitesize
- Doppler effect
- Doppler effect
- Big bang theory doppler effect
- Relativistic doppler effect ppt
- Doppler effect
- The doppler effect
- Doppler effect
- Doppler effect in sound
- Doppler effect
- Doppler effect
- Red shift