1. Waves and Wave properties

2. Simulation

3. Wave Information Waves are a travelling form of energy
Waves can also carry information
Sound
Light
Music
electricity

4. Wave Types Transverse Longitudinal
Oscillates perpendicular to the direction of the motion.
Examples are water waves and seismic
S-waves
Oscillate in the same direction/parallel to the direction of movement
They move by expanding and contracting
Examples are seismic P-waves and sound

5. Parts of a Wave:
Waves have the following parts:
Crest
Trough

6. What are the 2 different types of waves?
How are these 2 types of waves different?

9. Wave Properties Waves have 3 specific, identifying properties:
Frequency
Wavelength λ
Amplitude

10. Frequency How many times the wave oscillates up and down
Measured in Hz (hertz)
1 Hz is equal to 1 cycle per second
Water frequency is around Hz
Sound has a frequency range of 20-20,000 Hz

11. Wavelength Series of repeating highs and lows
Measured from crest to crest, or trough to trough

12. This is the amount/distance that the wave moves away from equilibrium
Amplitude:
This is the amount/distance that the wave moves away from equilibrium

13. If the frequency of a wave increases, what do you think will happen to the wavelength?
What type of a relationship is this?
Positive
Negative

14. Frequency and Wavelength have an inverse or negative relationship
Relationships:
Frequency and Wavelength have an inverse or negative relationship
As the frequency of a wave increases, its wavelength decreases OR
As the frequency of a wave decreases, its wavelength increases

15. Calculating the Speed of Waves
The speed of a wave is equal to its frequency multiplied by its wavelength.
V = ƒ ʎ
V=velocity/speed
ʎ = wavelength and ƒ= frequency
This tells you the speed of the oscillations through the material/medium.

16. Wave Interference:
When waves encounter an obstacle or interact with matter, they experience interference.
There are 4 types of wave interference
Reflection
Refraction
Diffraction
Absorption

17. Reflection

18. Refraction:
When a wave moves through a medium that slows or bends the wave’s movement it is refracted
Refraction of light causes objects to appear bent

19. Diffraction:
When a wave bends around objects such as sound bending around corners

20. Absorption:
When a wave encounters a medium and seems to disappear.

21. What is the difference between refraction and reflection?
What is an example of a wave that is reflected?
What is an example of a wave being refracted?

22. Interference Continued
Constructive Interference
Destructive Interference
When 2 waves that are “in phase” with one another collide
Their collision causes an increase in the waves effect
When 2 waves are “out of phase with one another collide
Their collision causes a decrease or temporary disappearance of the wave

23. Interference Continued

25. HARMONIC MOTION Motion that repeats in cycles
A cycle is a unit of motion that repeats over and over
Harmonic Motion is different from Linear Motion

27. Harmonic Motion Graphs

29. Pendulum Simulation