1. Waves: Sound and Light
IPC Unit 6

2. Waves Wave-a disturbance that transmits energy through space
Most waves require a medium (matter through which a wave travels like water or air)

3. Two Types of Waves
Transverse wave-particles of the medium vibrate perpendicular to the direction the wave
Ex: wave in water, light wave

4. Transverse Waves Crest-High point of a wave Trough-Low point of a wave
Amplitude-Distance from rest position to crest or trough; amount of energy in wave
Wavelength (λ)-distance between any two successive identical parts of a wave
Crestcrest, troughtrough, rarefactionrarefaction

5. Two Types of Waves
Longitudinal wave-particles of the medium vibrate parallel to the direction of the wave
Ex: slinky, sound wave

6. Longitudinal Waves
Compression–part of wave where the coils/particles are pressed together
Rarefaction–part of wave where the coils/particles are spread apart

7. Wave Interactions
Reflection-the bouncing back of a wave as it meets a surface or boundary

8. Wave Interactions
Refraction-the bending of waves as they pass from one medium to another

9. Wave Interactions
Diffraction-the bending of a wave as it passes an edge or an opening

10. Wave Interactions
Resonance-one vibration causes another vibration

11. Wave Interactions Interference-combination of two or more waves
Constructive interference: waves combine so that the resulting wave is bigger than the original waves
Destructive interference: waves combine so that the resulting wave is smaller than the original waves