1. (8.1 – 8.3)

2.  A wave is an oscillation that transfers energy through space or mass  A vibration or oscillation is classified as a cyclical motion about an equilibrium point.

3. MECHANICAL WAVES ELECTROMAGNETIC WAVES  Require a medium to transmit energy Examples:  Sound waves (medium = air)  Ocean waves (medium = water)  Waves on a guitar string (medium = metal strings)  Can travel without a medium (ie. In a vacuum) Examples:  Light  Radio waves  Ultraviolet waves  Infrared waves

7.  Mechanical Wave: the transfer of energy through a material due to vibration.  Medium: the material that permits the transmission of energy through vibrations.  Net Motion: the displacement of a particle over a certain time interval; the difference between the particles initial and final positions.

8. TRANSVERSE WAVESLONGITUDINAL WAVES  particle vibration is perpendicular to the direction of the energy transfer  particle vibration is parallel to the direction of the energy transfer  Sometimes called compression waves

9. TRANSVERSE WAVESLONGITUDINAL WAVES Example:

11. Crest – Max point of transverse wave Trough – Min point of transverse wave Amplitude – The maximum displacement of a wave from its equilibrium point

20.  https://www.youtube.com/watch?v=egcB0NbKPQI https://www.youtube.com/watch?v=egcB0NbKPQI  https://www.youtube.com/watch?v=PZUfD1-9hh8 https://www.youtube.com/watch?v=PZUfD1-9hh8  https://www.youtube.com/watch?v=n6ZujUJ7OXA https://www.youtube.com/watch?v=n6ZujUJ7OXA  https://www.youtube.com/watch?v=KxcaFXac3-Y https://www.youtube.com/watch?v=KxcaFXac3-Y  https://www.youtube.com/watch?v=GQerm2mtp1M https://www.youtube.com/watch?v=GQerm2mtp1M  https://www.youtube.com/watch?v=GQerm2mtp1M https://www.youtube.com/watch?v=GQerm2mtp1M  https://www.youtube.com/watch?v=7cDAYFTXq3E https://www.youtube.com/watch?v=7cDAYFTXq3E  http://www.slideshare.net/ysina/physics-by-younes- sina http://www.slideshare.net/ysina/physics-by-younes- sina