1. Section 3-1
The Nature of Waves

2. Wave Energy
Wave- any disturbance that transmits energy through matter or empty space
Energy can be carried away from its source by a wave
However the material through which the wave travels does not move with the energy

4. Waves and Work Waves do work on everything in its path
Movement of objects prove that energy is transmitted

5. Energy Transfer Through a Medium
Medium- a substance through which a wave can travel
Medium can be a solid, liquid, or gas
Mechanical wave- waves that need a medium to travel
Examples: sound wave, ocean waves, and earthquakes

6. Energy Transfer Without a Medium
Some waves do not require a medium to travel
Examples: light waves, electromagnetic waves

7. Types of Waves
Transverse wave- wave in which the particles move up and down motions
Particles move across or perpendicular to the direction the wave is traveling
Transverse waves are made of crests and troughs
Longitudinal Wave- particles of the medium vibrates back and forth along the path that the wave moves
Longitudinal waves are made of compressions (crowded together) and rarefactions (spaced apart)

9. Sound Waves Type of longitudinal wave
Sound travels along the compressions and rarefactions of air particles

10. Combinations of Waves
Surface wave- a combination of both transverse wave and longitudinal wave
Surface waves look like transverse waves but the particles move in circles