1. WavesSection 1 What Is a Wave? What does a wave carry?

2. WavesSection 1 15-1-1 What Is a Wave? A wave is a disturbance that carries energy through matter or space.

3. WavesSection 1 What Is a Wave?, continued

4. WavesSection 1 15-1-2 What Is a Wave?, continued mechanical wave: a wave that requires a medium through which to travel –examples: sound waves, water waves

5. WavesSection 1 15-1-3 What Is a Wave?, continued medium: a physical environment in which phenomena occur

6. WavesSection 1 15-1-4 What Is a Wave?, continued Electromagnetic waves do not require a medium.

7. WavesSection 1 15-1-5 What Is a Wave?, continued electromagnetic wave: a wave that consists of oscillating electric and magnetic fields, which radiate outward at the speed of light

8. WavesSection 1 15-1-6 What Is a Wave?, continued examples: visible light waves, radio waves

9. WavesSection 1 15-1-7 What Is a Wave?, continued Waves transfer energy.

10. WavesSection 1 15-1-8 What Is a Wave?, continued As sound waves travel outward, the spherical wave fronts get bigger, so the energy spreads out over a larger volume.

11. WavesSection 1 Vibrations and Waves How are waves generated?

12. WavesSection 1 15-1-9 Vibrations and Waves Most waves are caused by vibrating objects.

13. WavesSection 1 15-1-10 Vibrations and Waves, continued The vibration of a mass-spring system is called simple harmonic motion.

14. WavesSection 1 15-1-11 Vibrations and Waves, continued A wave is a disturbance that transfers energy through a medium.

15. WavesSection 1 Transverse and Longitudinal Waves What is the difference between a transverse wave and a longitudinal wave?

16. WavesSection 1 15-1-12 Transverse and Longitudinal Waves, continued transverse wave: a wave in which the particles of the medium move perpendicularly to the direction the wave is traveling

17. WavesSection 1 15-1-13 Transverse and Longitudinal Waves, continued longitudinal wave: a wave in which the particles of the medium vibrate parallel to the direction of wave motion

18. WavesSection 1 15-1-14 Transverse and Longitudinal Waves, continued Waves have crests and troughs or compressions and rarefactions.

19. WavesSection 1 Surface Waves How do the particles in ocean waves move?

20. WavesSection 1 15-1-15 Surface Waves surface waves: waves that occur at the boundary between two different mediums, such as water and air

21. WavesSection 1 15-1-16 Surface Waves The particles in a surface wave move both perpendicularly and parallel to the direction in which the wave travels.