1. Chapter 10

2. Nature of Waves Wave Repeating disturbance or movement Carries energy through matter and space

3. Vibrations Anything that moves in a rhythmic patter Up and down Back and forth What is a Wave All waves are produced when something vibrates Pendulum

4. Mechanical Waves (2 types) Transverse Matter moves up and down perpendicular to the direction of wave motion Light Compression (Longitudinal) Matter moves parallel to wave motion Sound

5. Wave Properties - Transverse

6. Wave Properties - Compression

7. Measuring Waves Wavelength (m) Distance between one point on a wave and the same point on the next wave Frequency (1/s or Hertz) Number of wavelengths that pass a fixed point each second How fast the source vibrates Relationship between frequency and wavelength is…

8. Wave Speed Medium – matter through which a wave will travel Speed of the wave depends on the medium Sound Light Temperature also affects wave speed

9. Wave Speed Equation

10. Amplitude and Energy Amplitude Related to the amount of energy carried by the wave Greater amplitude means… Transverse wave Compression wave

11. Wave Behavior - Reflection Wave strikes a boundary and bounces back off of it Law of Reflection Angle of incidence equals the angle of reflection

12. Wave Behavior - Refraction Bending of a wave as it passes from one medium to another Bending Caused by a change in wave speed

13. Wave Behavior - Diffraction Change in direction of a wave as it bends around an object

14. Wave Behavior - Interference Two or more waves overlap and combine to form a new waveoverlap Light Sound

15. Interference – 2 Types Constructive In-phase Crests align with crests; troughs align with troughs Amplitude increases Destructive Out-of-Phase Amplitude decreases Can cancel out completely

16. Electromagnetic Spectrum