1. Wave Behaviors
Unit 2: Waves

2. What can waves do once they are traveling?
Waves can bend: Refraction
Usually caused by speed changes when moving from one medium to another.
The greater the speed change the greater the bend.

3. What can waves do once they are traveling?
Diffraction:  occurs when waves bend around small obstacles, or when waves spread out after they pass through small openings
Example: Prisms

4. What can waves do once they are traveling?
They can bounce back and turn around: reflection.
This happens when it meets a surface that does not absorb the energy of the wave.
All waves can do this.
Echoes: reflection of sound waves
Mirrors: reflection of light waves

5. What can waves do once they are traveling?
They can simply pass through a given point or the medium: Transmission.
Sometimes not all the energy is transmitted. This is mainly seen when dealing with light waves.

6. What can waves do once they are traveling?
They can absorbed by the medium.
This happens when the wave is not transmitted or reflected by the medium.

7. Sometimes, waves can interfere with each other:
They can interfere constructively. This means that when two crests meet then they get added together to make a bigger crest. The same is said for when two troughs meet, when two compressions meet, and when two rarefactions meet.

8. Sometimes, waves can interfere with each other:
They can interfere destructively. This is when a crest and a trough meet or compression and rarefaction meet, the interference will cause the two to cancel out or lesson in amplitude.

9. Interference and Sound
Sound waves interfere with each other and can ultimately change 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.

10. Recap

11. Activity
You will be divided into groups of 2 or 3. There are 9 stations set up around the room. You are to go to each station and tell which behavior you are looking at and why you believe it is that behavior.
Work will be completed on a hand out and turned in when you are done.