1. Section 3-3
Wave Interactions

2. Reflection
Reflection- occurs when a wave bounces back after striking a barrier
Echo- reflected sound wave

3. Refraction
Refraction- the bending of a wave as it passes at an angle from 1 medium to another

4. Properties of Refraction
Refraction causes different colors of light because light refracts in different amounts
Refraction causes objects to look closer than they really are

5. Diffraction
Diffraction- the bending of waves around a barrier or through an opening

6. Interference Interference- the overlapping of 2 or more waves
Constructive Interference- occurs when the crest of 1 wave overlaps with the crest of another wave
Creates larger amplitude
Destructive Interference- occurs when the crest of 1 wave overlaps the trough of another wave
Creates smaller amplitudes

7. Standing Waves
Standing Wave- wave that forms a stationary patterns in which portions are at the rest position due to total destructive and other portions have a larger amplitude due to constructive interference
Resonance occurs when an object vibrating at or near resonant frequency causes a second object to vibrate