1. 1 15 Traveling Waves Hk: 25, 45, 55, 79. Simple wave motion Periodic waves Waves in three dimensions Waves encountering barriers The Doppler Effect (shock waves)

2. Waves 2 transverse longitudinal Wave shape Propagate energy (not mass)

3. 3 wave speed on string

4. 4 Regular and Sinusoidal

5. 5 watt/m 2 Intensity measures the wave propagation energy arriving per second per square meter. Example: 100W of light are directed onto a 2x2 square meter surface. The intensity is 100W/4m 2 = 25 W/m 2.

6. 6 Reflection at more dense barrier.

7. 7 Reflection at less dense barrier.

8. 8

9. 9 Diffraction (width ~ wavelength)

10. 10 Diffraction (width >> wavelength)

11. 11

12. 12 summary wave motion intensity harmonic waves Reflection, refraction, diffraction Doppler Effect

13. 13 Wavelength distortion due to receiver motion.

14. 14

15. 15

16. 16

17. 17

18. 18 periodic waves repeats with regular period T. A, max amplitude Wavelength (λ) is the distance between any point on a periodic wave and the next point corresponding to the same portion of the wave.

19. 19 harmonic wave sinusoidal all periodic waves can be modeled by a sum of harmonic waves, e.g. fourier analysis wave number, k angular frequency, w

20. 20 Regular and Sinusoidal

21. 21 Intensity Level is the intensity level in dB of sound with intensity I where is defined as the minimum audible intensity intensity level is therefore comparative

22. 22 wavelength distortion due to source motion