1. Waves

2. What is a Wave?

3. Longitudinal Wave

4. Transverse Wave

5. Clickers! What does a wave carry? a)Energy b)Matter c)Particles d)Atoms

6. Mechanical Waves

7. Electromagnetic Waves

8. Clickers! A transverse wave travels _______ to the direction of the wave’s motion. a)at various angles b)longitudinal c)parallel d)perpendicular

10. Amplitude and Energy

11. Transverse vs Longitudinal Amplitude/Energy

12. Clickers! A wave’s energy is related to its: a)Wavelength b)Frequency c)Amplitude d)Length

13. Electromagnetic Spectrum

14. Quick Check! The electromagnetic spectrum is based on a)Amplitude b)Frequency c)The line of origin d)Wavelength

15. Frequency

16. Frequency and Wavelength’s Relationship

17. Resonance

18. Color and Pitch

19. Straw Kazoo Bite down on one end of the straw. With scissors, cut a “V” shape at the end you bit down on. Questions 1.What does the initial pitch sound like? 2.What happens to the pitch as the length of the straw decreases? Why does it happen?

20. The Eye

21. The Eye Continued…

22. The Ear

24. Reflection

25. Refraction

26. Quick Check Refraction occurs when the a)Speed of a wave changes b)Wavelength of a wave changes c)Amplitude of a wave changes d)Energy of a wave increases.

27. Diffraction

28. Quick Check Diffraction is a)The bending of light waves around a barrier b)When a wave bounces off an object c)The ability to form a new wave d)The number of waves that pass a point per second.

29. Wave Interference

30. Doppler Effect

31. Law of Reflection

32. Wave Calculations

33. Wave Speed – Problem 1 A wave along a guitar string has a frequency of 540 Hz and a wavelength of 2.5 meters. Calculate the speed of the wave.

34. Wave Speed – Problem 2 The speed of sound in air is about 340 m/s. What is the wavelength of sound waves produced by a guitar string vibrating at 490 Hz?

35. Wave Speed – Problem 3 The speed of light is 300,000,000 m/s. What is the frequency of microwaves with a wavelength of 0.01 meter? What is the period of the microwaves in the above question?

36. Quick Check 1 In class, I release sound waves with a frequency of 300 Hz. What was the wavelength of the wave in air? a).88 m b).25 m c)40 m d)1.1 m e).0033

37. Quick Check 2 A wave oscillates with a period of 2.0 s, what is its frequency? a).25 Hz b).5 Hz c)2.0 Hz d)4.0 Hz