1. EQ: How do waves interact with each other?
Interactions of Waves
EQ: How do waves interact with each other?

2. EQ: How do waves interact with each other?
Reflection: The bouncing back of a wave after it strikes a barrier. When water waves hit the side of the swimming pool, they bounce back.
Angle of reflection
Angle of incidence
EQ: How do waves interact with each other?
Reflected wave
Incoming Wave

3. The angle of reflection equals the angle of incidence
Law of Reflection
The angle of reflection equals the angle of incidence
Hitting a ball against the wall, mirror, echo
EQ: How do waves interact with each other?

4. Refraction The bending of a wave as it crosses the boundary between two mediums. This is caused by change in speed as it enters the second medium.
What are the two mediums the straw has entered?
Sticky wheel on a grocery cart example. One wheel over powers the other
EQ: How do waves interact with each other?

5. Diffraction- The spreading out or bending of waves as they pass through a hole in a barrier or around the edges of a barrier.
EQ: How do waves interact with each other?

6. Constructive Interference
Two waves combine to make a wave with a larger amplitude
EQ: How do waves interact with each other?

7. Destructive Interference
When the amplitudes of two waves combine with each other producing a smaller amplitude
EQ: How do waves interact with each other?

8. Standing Wave - The result of the interference of the two waves below is a new wave pattern known as a standing wave pattern. Standing waves are produced whenever two waves of identical frequency interfere with one another while traveling opposite directions along the same medium.
EQ: How do waves interact with each other?

9. nodes and antinodes
Nodes – when destructive interference causes two waves to combine to produce an amplitude of zero
Antinodes – combined amplitude of the two waves combine to produce amplitudes greater than zero.
EQ: How do waves interact with each other?

10. Resonance
Occurs when vibrations traveling through an object match the object’s natural frequency
EQ: How do waves interact with each other?

11. Class Work and Homework
Fill In
What did I learn
Confused
Say
Read pages O 24 – O 29
Worksheet 1-3
Test one week from Friday
Types of waves
Properties of waves
Interaction of Waves
Seismic Waves
EQ: How do waves interact with each other?