1. Lesson 3: Properties of waves
Unit 7:
WAVES
Lesson 3: Properties of waves

2. Speed of Waves (affected by medium)
During 1 period, the wave travels 1 wavelength.
5 min 
“Universal Wave Equation”

3. Find: a) The period and the frequency of the waves.
Example (Try it!): Bill was sitting on the dock when he noticed ocean waves with their crests 3.5 m apart. A buoy nearby bobbed up and down 24 times in a minute.
Find: a) The period and the frequency of the waves.
b) The speed of the waves.
20 min

4. Brain Break!

5. Reflection Fixed end: wave is reflected on opposite side
Loose end: wave is reflected on same side
5 min

6. Constructive interference Destructive interference (cancelling out)
Principle of Superposition
When two waves coincide (pass through each other) their amplitudes add algebraically.
Constructive interference
Destructive interference (cancelling out)
5 min

7. Practice Time!
Pg. 181 #2-12
Pg. 194 #5 and 11
20 min