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

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

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?

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?

Diffraction- The spreading out or bending of waves as they pass through a hole in a barrier or around the edges of a barrier. http://ngsir.netfirms.com/englishhtm/Diffraction.htm http://ngsir.netfirms.com/englishhtm/Diffraction.htm http://ngsir.netfirms.com/englishhtm/Diffraction.htm http://ngsir.netfirms.com/englishhtm/Diffraction2.htm http://ngsir.netfirms.com/englishhtm/Diffraction3.htm EQ: How do waves interact with each other?

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

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

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?

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?

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

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?