1. Hints and examples

2. When the crest of one wave meets the crest of another wave and the amplitude of the wave becomes bigger. This also happens when the trough of one wave and the trough of another wave meets as well. The wave gets bigger! After the 2 waves meet, they continue to travel in the direction they were going. Constructive Interference

3. Destructive Interference When the crest of one wave meets the trough of another wave and the amplitude of the wave is canceled. Crest and trough meet and the wave is canceled. After the 2 waves meet, they continue to travel in the direction they were going.

5. Wave speed equation: Wave speed (m/s) = frequency (Hz) x wavelength (m) Electromagnetic waves travel fastest in gases and slowest in solids. Ex: light travels faster through air than in water.

6. Reflection: Examples: Occurs when a wave hits an object or surface and bounces off. Reflect: To bounce back

7. The bending of waves around a barrier. When this person yells, the people on the other side of the door can her them. The sound waves bend around the door opening.

8. The bending of a wave as it moves from one medium to another. Air is the medium at this point. Air is a gas, so the medium is a gas. Air is the medium at this point. Air is a gas, so the medium is a gas. Water is the medium at this point. Water is a liquid, so the medium is now a liquid. The waves slow down, so it looks bent or broken. Water is the medium at this point. Water is a liquid, so the medium is now a liquid. The waves slow down, so it looks bent or broken.

9. COMPRESIONAL OR LONGITUDINAL WAVES The part of the wave that is close together The part of the wave that are far apart Compression to compression or Rarefaction to rarefaction Compression to compression or Rarefaction to rarefaction