1. Homework Wednesday, April 10, 2019 A-Day Study WOW
Objective: YWBAT describe reflection, refraction, diffraction, and interference.
Drill: Explain how two waves can cancel each other out.
Homework
Study WOW

2. Answer
When two waves with the same amplitude overlap so that the crests of one wave overlap the troughs of the other, they cancel each other out through destructive interference. This results in a flat wave.

3. Did you know…?
During the Vietnam War, U.S. soldiers used Slinkys as mobile radio antennas.

4. Today’s Activities Drill NorthBay Journals Check Power School
Waves practice
Study WOW
Conclusion

5. Closure
Refraction occurs when a wave enters a new medium at an angle because ______________.

6. Conclusion Answer
Refraction occurs when a wave enters a new medium at an angle because the wave speed changes.