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WAVES. Mr. Bak This material is based upon work supported by the National Science Foundation under Grant No. NSF DGE-0742462. Content . What are waves Types Electromagnetic waves AC current Ocean wave creation movement Reflection Refraction Interference Constructive/destructive
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WAVES Mr. Bak This material is based upon work supported by the National Science Foundation under Grant No. NSF DGE-0742462
Content • What are waves • Types • Electromagnetic waves • AC current • Ocean wave creation • movement • Reflection • Refraction • Interference • Constructive/destructive • Doppler Effect
What are Waves? • Energy Transfer • Does Medium Move?
2 Types of Waves • Longitudinal • Transverse
Common Types of Waves • Electromagnetic Waves • Light, Microwaves, X-rays, etc. • AC current • Ocean Waves • Sound
Ocean Wave Creation • Duration • Speed • Fetch
Refraction • Snell’s Law • Ocean - shallow water • Wave moves slower • Causes wrapping • Light - change speed • Shallow • prism
Wave Diffraction • Encounters obstacle • Some energy blocked • What makes it through spreads • Longer wave length travels more effecently • Red sunsets • Bass travels better
Interference • 2 types of interference • Constructive and Destructive • Phase
Doppler Effect • What is Doppler Effect? • Mostly evident with Sound • As object emitting (sound) waves travels • The movement changes the wave length • Stack up • http://www.lon-capa.org/~mmp/applist/doppler/d.htm