1. Section2 :Wave Properties Wave: disturbance that carries energy

2. Mechanical Waves: Wave that carries energy through a material (medium)-air,water,metal
Types of waves:
Pulse Wave: A single disturbance or wave
Continuous Wave / periodic wave: A group of pulse waves or a bunch of waves

3. Transverse wave: Particle move up and down
Examples:

4. Longitudinal or Compression Wave: Particles move back and forth
Examples:

5. Surface Waves: Examples:
Surface Waves: Examples:

6. Earth Quakes
S-Wave: Transverse wave
P-Wave: Compression wave

7. Parts of Waves:

8. Wave Speed: Speed of the wave. ** Does not change in a medium**
 =    - Wave speed (m/s) or - Frequency (Hz)
=  /T T – Period (sec)
- Wave length (m)
EX-1 ) Calculate the frequency and period of wave speed for the following situation.

9. EX-2) A piano emits a frequency that ranges from a low of about 28 Hz to a high of about 4200 Hz. Find the range of wavelengths in air from this instrument when the speed of sound in air is 340 m/s.

10. Wave Interference Waves at boundaries:
Incident wave – Wave approaching boundary
Reflected wave – Wave after reflection
Loose end
Fixed end

11. Principle of Superposition: When two wave interact, the resultant wave is the sum of the two.

12. Constructive Interference:

13. Destructive Interference:

14. Standing Waves: happen when two waves of the same frequency and amplitude oppose each other and cause interference.
Node:
Nodes: Regions of destructive interference
Anti Nodes: Regions of constructive interference.

15. Beats: Two wave that are very close in frequency causing distinctive collective regions of interference

16. Interference Patterns: Patterns created when the waves on 2 or more sources create repetitive regions of constructive and destructive interference