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Physics 100
Instructor: Asa Bradley
Chapter 19:
Vibration and Waves
Longitudinal Waves
Example:
• sound waves in solid, liquid, gas
• P-waves that travel in the ground (providing geologic
information)
Åsa Bradley
Physics 102
Compression
Loudness depends
primarily on the
pressure amplitude
of a wave.
Åsa Bradley
Physics 102
Wave Interference
Constructive interference :
Destructive interference :
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Physics 100
Instructor: Asa Bradley
Chapter 19:
Vibration and Waves
Interference
Constructive Interference
Destructive Interference
2
Physics 100
Instructor: Asa Bradley
Chapter 19:
Vibration and Waves
Doppler Shift
Åsa Bradley
Physics 102
Doppler Shift
Åsa Bradley
Physics 102
Doppler Shift
Åsa Bradley
Physics 102
3
Physics 100
Instructor: Asa Bradley
Chapter 19:
Vibration and Waves
Bow Wave
Bow Wave
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Physics 100
Instructor: Asa Bradley
Chapter 19:
Vibration and Waves
Shock Wave
Shock Wave
Shock Wave
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Physics 100
Instructor: Asa Bradley
Chapter 19:
Vibration and Waves
Åsa Bradley
Physics 102
Åsa Bradley
Physics 102
Åsa Bradley
Physics 102
6
Physics 100
Instructor: Asa Bradley
Chapter 19:
Vibration and Waves
Åsa Bradley
Physics 102
Resonance
Åsa Bradley
Physics 102
Tacoma Narrows Bridge
Dramatic example of wind-generated resonance
The third longest suspension span in the world opened on July 1st 1940. Only four months later, the
great span's short life ended in disaster and "Galloping Gertie," collapsed in a windstorm on
November 7.
This documentary took second place at Nationals in National History Day 2007 in the junior group
division. The theme was Tragedy and Triumph. Made by Koyo Kim and Raluca Ifrim.
http://www.youtube.com/watch?v=ASd0t3n8Bnc
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