![Page 1: Please be Seated. Making Waves Physics is Phun January 2007](https://reader035.vdocuments.us/reader035/viewer/2022081520/5697bfc11a28abf838ca4304/html5/thumbnails/1.jpg)
Pleasebe
Seated
![Page 2: Please be Seated. Making Waves Physics is Phun January 2007](https://reader035.vdocuments.us/reader035/viewer/2022081520/5697bfc11a28abf838ca4304/html5/thumbnails/2.jpg)
Making Waves
Physics is Phun
January 2007
![Page 3: Please be Seated. Making Waves Physics is Phun January 2007](https://reader035.vdocuments.us/reader035/viewer/2022081520/5697bfc11a28abf838ca4304/html5/thumbnails/3.jpg)
View this PowerPoint program
Programs for Pre-College Students
![Page 4: Please be Seated. Making Waves Physics is Phun January 2007](https://reader035.vdocuments.us/reader035/viewer/2022081520/5697bfc11a28abf838ca4304/html5/thumbnails/4.jpg)
Bell in Vacuum Experiment
![Page 5: Please be Seated. Making Waves Physics is Phun January 2007](https://reader035.vdocuments.us/reader035/viewer/2022081520/5697bfc11a28abf838ca4304/html5/thumbnails/5.jpg)
Transverse Waves
![Page 6: Please be Seated. Making Waves Physics is Phun January 2007](https://reader035.vdocuments.us/reader035/viewer/2022081520/5697bfc11a28abf838ca4304/html5/thumbnails/6.jpg)
c = f
c = speed of light
f = frequency= wavelength
![Page 7: Please be Seated. Making Waves Physics is Phun January 2007](https://reader035.vdocuments.us/reader035/viewer/2022081520/5697bfc11a28abf838ca4304/html5/thumbnails/7.jpg)
Speed of Light(in a vacuum)
c = 300,000,000 m/s
= 3 x 108 m/s
![Page 8: Please be Seated. Making Waves Physics is Phun January 2007](https://reader035.vdocuments.us/reader035/viewer/2022081520/5697bfc11a28abf838ca4304/html5/thumbnails/8.jpg)
![Page 9: Please be Seated. Making Waves Physics is Phun January 2007](https://reader035.vdocuments.us/reader035/viewer/2022081520/5697bfc11a28abf838ca4304/html5/thumbnails/9.jpg)
Longitudinal Waves
![Page 10: Please be Seated. Making Waves Physics is Phun January 2007](https://reader035.vdocuments.us/reader035/viewer/2022081520/5697bfc11a28abf838ca4304/html5/thumbnails/10.jpg)
s = f
s = speed of sound
f = frequency= wavelength
![Page 11: Please be Seated. Making Waves Physics is Phun January 2007](https://reader035.vdocuments.us/reader035/viewer/2022081520/5697bfc11a28abf838ca4304/html5/thumbnails/11.jpg)
Speed of Sounds = 331.45 m/s
~1087 ft/s
at 0o C
s = depends on temperature
but not on pressure
![Page 12: Please be Seated. Making Waves Physics is Phun January 2007](https://reader035.vdocuments.us/reader035/viewer/2022081520/5697bfc11a28abf838ca4304/html5/thumbnails/12.jpg)
The “Sonic” SpectrumInfrasound:
< 20 Hz
Sound:20 Hz – 20,000 Hz (20kHz)
Ultrasound:> 20 kHz (~1013 Hz maximum)
![Page 13: Please be Seated. Making Waves Physics is Phun January 2007](https://reader035.vdocuments.us/reader035/viewer/2022081520/5697bfc11a28abf838ca4304/html5/thumbnails/13.jpg)
Light waves:1. are transverse waves.2. do not require a medium.
Sound waves:1. are longitudinal waves.2. require a medium.
![Page 14: Please be Seated. Making Waves Physics is Phun January 2007](https://reader035.vdocuments.us/reader035/viewer/2022081520/5697bfc11a28abf838ca4304/html5/thumbnails/14.jpg)
Wave Properties I• Superposition
• Hugygens’ Principle
• Doppler Effect
![Page 15: Please be Seated. Making Waves Physics is Phun January 2007](https://reader035.vdocuments.us/reader035/viewer/2022081520/5697bfc11a28abf838ca4304/html5/thumbnails/15.jpg)
Superposition
![Page 16: Please be Seated. Making Waves Physics is Phun January 2007](https://reader035.vdocuments.us/reader035/viewer/2022081520/5697bfc11a28abf838ca4304/html5/thumbnails/16.jpg)
Huygens’ Principle
![Page 17: Please be Seated. Making Waves Physics is Phun January 2007](https://reader035.vdocuments.us/reader035/viewer/2022081520/5697bfc11a28abf838ca4304/html5/thumbnails/17.jpg)
Doppler Effect• Sound
Doppler BallMoving Cars, etc.
• LightSpectra of stars
![Page 18: Please be Seated. Making Waves Physics is Phun January 2007](https://reader035.vdocuments.us/reader035/viewer/2022081520/5697bfc11a28abf838ca4304/html5/thumbnails/18.jpg)
Fraunhofer Spectrum
![Page 19: Please be Seated. Making Waves Physics is Phun January 2007](https://reader035.vdocuments.us/reader035/viewer/2022081520/5697bfc11a28abf838ca4304/html5/thumbnails/19.jpg)
Wave Properties II•Diffraction
•Interference
•Reflection
•Refraction
![Page 20: Please be Seated. Making Waves Physics is Phun January 2007](https://reader035.vdocuments.us/reader035/viewer/2022081520/5697bfc11a28abf838ca4304/html5/thumbnails/20.jpg)
Diffraction
Waves spread out and bend around corners within the same medium.
![Page 21: Please be Seated. Making Waves Physics is Phun January 2007](https://reader035.vdocuments.us/reader035/viewer/2022081520/5697bfc11a28abf838ca4304/html5/thumbnails/21.jpg)
Highway Sound Barrier
Photograph courtesy of Enterprise Flasher Company
![Page 22: Please be Seated. Making Waves Physics is Phun January 2007](https://reader035.vdocuments.us/reader035/viewer/2022081520/5697bfc11a28abf838ca4304/html5/thumbnails/22.jpg)
Interference
Two-source interference patternMoire figure model
![Page 23: Please be Seated. Making Waves Physics is Phun January 2007](https://reader035.vdocuments.us/reader035/viewer/2022081520/5697bfc11a28abf838ca4304/html5/thumbnails/23.jpg)
Bose QuietComfort 2Noise Cancelling Headphones
![Page 24: Please be Seated. Making Waves Physics is Phun January 2007](https://reader035.vdocuments.us/reader035/viewer/2022081520/5697bfc11a28abf838ca4304/html5/thumbnails/24.jpg)
Light examples
![Page 25: Please be Seated. Making Waves Physics is Phun January 2007](https://reader035.vdocuments.us/reader035/viewer/2022081520/5697bfc11a28abf838ca4304/html5/thumbnails/25.jpg)
“Iridescence”of peacock feather
![Page 26: Please be Seated. Making Waves Physics is Phun January 2007](https://reader035.vdocuments.us/reader035/viewer/2022081520/5697bfc11a28abf838ca4304/html5/thumbnails/26.jpg)
Reflection
![Page 27: Please be Seated. Making Waves Physics is Phun January 2007](https://reader035.vdocuments.us/reader035/viewer/2022081520/5697bfc11a28abf838ca4304/html5/thumbnails/27.jpg)
Refraction
Waves bend due to variation of medium.
![Page 28: Please be Seated. Making Waves Physics is Phun January 2007](https://reader035.vdocuments.us/reader035/viewer/2022081520/5697bfc11a28abf838ca4304/html5/thumbnails/28.jpg)
Waves at the Beach
![Page 29: Please be Seated. Making Waves Physics is Phun January 2007](https://reader035.vdocuments.us/reader035/viewer/2022081520/5697bfc11a28abf838ca4304/html5/thumbnails/29.jpg)
Mirage Formation
![Page 30: Please be Seated. Making Waves Physics is Phun January 2007](https://reader035.vdocuments.us/reader035/viewer/2022081520/5697bfc11a28abf838ca4304/html5/thumbnails/30.jpg)
Water Mirage
![Page 31: Please be Seated. Making Waves Physics is Phun January 2007](https://reader035.vdocuments.us/reader035/viewer/2022081520/5697bfc11a28abf838ca4304/html5/thumbnails/31.jpg)
Desert Lake
![Page 32: Please be Seated. Making Waves Physics is Phun January 2007](https://reader035.vdocuments.us/reader035/viewer/2022081520/5697bfc11a28abf838ca4304/html5/thumbnails/32.jpg)
Mirage
Compliments of Robert Greenler
![Page 33: Please be Seated. Making Waves Physics is Phun January 2007](https://reader035.vdocuments.us/reader035/viewer/2022081520/5697bfc11a28abf838ca4304/html5/thumbnails/33.jpg)
Sunrise over the Ocean
![Page 34: Please be Seated. Making Waves Physics is Phun January 2007](https://reader035.vdocuments.us/reader035/viewer/2022081520/5697bfc11a28abf838ca4304/html5/thumbnails/34.jpg)
The EndSee you next time!
Animated Gifs compliments of bellsnwhistles.com
We are on the web at http://www.physics.umd.edu/lecdem/