1. Mechanical Waves Intersecting
8.P.3A.4

2. Waves Intersecting Waves interfere with each other.
Interference may be constructive.
A crest will interfere with another crest constructively to produce a larger crest and a trough will interfere to produce a larger trough.
Compressions interfere constructively with each other as do rarefactions.

3. Waves Intersecting

4. Waves Intersecting Interference may be destructive.
A crest will interfere with a trough to lessen or cancel the displacement of each.
Compressions interfere with rarefactions to lessen or cancel the displacement of each.

5. Waves Intersecting

6. Waves Intersecting
Sound waves interfere with each other changing what you hear.
Destructive interference makes sounds quieter.
Constructive interference makes sounds louder.
Sound waves reflect in tubes or some musical instruments to produce standing waves which reinforce sound through constructive interference to make the sound louder.

7. Waves Intersecting

8. Today’s Activities
Please construct a foldable including the definitions of the following terms:
Refraction
Prism/Diffraction Gratings
Reflection
Transmission
Opaque
Translucent
Absorption