1. Waves Surfing Glacier Calving Pool

2. Mechanical Waves A method of energy transfer – As work and heat are also methods of transfer Require a physical medium to propagate after a disturbance supplies energy and creates the wave – Amber waves of grain? Amber waves of grain?

3. http://www.youtube.com/watch?v=OB5c39PZ FQ4 http://www.youtube.com/watch?v=OB5c39PZ FQ4 http://www.youtube.com/watch?v=RL3EjH9- WSs http://www.youtube.com/watch?v=RL3EjH9- WSs http://www.youtube.com/watch?v=wHI0GM_ nF8s http://www.youtube.com/watch?v=wHI0GM_ nF8s

4. Mechanical Waves Resonance http://www.youtube.com/watch?v=0M21_zC o6UM http://www.youtube.com/watch?v=0M21_zC o6UM Wave http://www.youtube.com/watch?v=YjFrS11Kq GQ http://www.youtube.com/watch?v=YjFrS11Kq GQ

5. Types of waves Transverse Medium vibrates perpendicular to direction of wave Longitudinal Medium vibrates parallel to direction of wave

6. Transverse Wave Applet Yes to run java From applet menu select waves – transverse waves – transverse waves Set the frequency in the middle Follow the motion of one dot Follow the motion of the wave

7. Amplitude Wavelength Crest Trough Transverse Wave

8. FrequencyPeriod How many waves go past the line per second?How long does it take one wave to go past the line?

9. Longitudinal Wave Follow the motion of one dot Follow the motion of the wave

10. Longitudinal Wave wavelength

11. Wave Properties Reflection – When a wave bounces off an object Refraction – When a wave enters a new medium Diffraction – When a wave bends around an object Interference – When waves add their amplitudes together Standing Waves – When a wave appears to be stationary

12. Reflection - Refraction Applet Yes to run java From applet menu select waves – transverse – reflection and transmission Show free and fixed reflection Show refraction (transmission)

13. Reflection - Refraction Applet Yes to run java From applet menu select Physics – Light – bending light Change the beam to waves Measure <i and <r Bending toward and away from normal

14. Diffraction Applet

15. Interference Applet Ok to run Waves - transverse – adding transverse 1

16. Standing Waves Applet Run without showing resultant first Add resultant wave Run with resultant only

17. Wave Speed distance = wavelength time = period

18. Wave Speed Since period and frequency are inverse

19. Sound Intensity: energy flow through an area – Decibel (dB) Log scale Loudness:Physical perception of the intensity – You will perceive two frequency sounds to have a different loudness even when they have the same intensity

20. EAR Pinna Ear Canal Hammer Oval Window Stirrup Anvil Ear Drum Cochlea Semicircular canals Auditory Nerve Eustation Tube

21. Doppler Effect Youtube Second Three Four

22. Doppler Effect http://astro.unl.edu/classaction/animations/li ght/dopplershift.html http://astro.unl.edu/classaction/animations/li ght/dopplershift.html http://highered.mcgraw- hill.com/olcweb/cgi/pluginpop.cgi?it=swf::800 ::600::/sites/dl/free/0072482621/78778/Dopp ler_Nav.swf::Doppler%20Shift%20Interactive http://highered.mcgraw- hill.com/olcweb/cgi/pluginpop.cgi?it=swf::800 ::600::/sites/dl/free/0072482621/78778/Dopp ler_Nav.swf::Doppler%20Shift%20Interactive Best

23. What does each person hear?

24. Doppler shift works with light also