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Chapter 10. Nature of Waves Wave Repeating disturbance or movement Carries energy through matter and space.

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Presentation on theme: "Chapter 10. Nature of Waves Wave Repeating disturbance or movement Carries energy through matter and space."— Presentation transcript:

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


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