1. Electromagnetic and Mechanical Waves Kymberly Mayfield 11/21/11 5 TH Hour

2. Electromagnetic Waves: Waves that do not need a medium. Radio Waves: Slowest waves Micro-Waves: subsets of radio waves How waves radiate from a radio tower. Radio Towers Cell Phones use micro waves. Smart Boards also use Micro Waves.

3. Electromagnetic Waves Infrared Waves: measured from the nominal edge of visible red light Visible Light: electromagnetic radiation visible to the human eye Infrared Waves are commonly used for night vision Infrared heaters use infrared waves These are some colors that you may see when looking at visible light frequencies This rainbow shows many different visible light frequencies

4. Electromagnetic Waves Ultra Violet: electromagnetic waves with frequencies higher than humans could identify X-Rays: often used to see through things Tanning beds use ultraviolet waves This Portable UV light uses ultra violet waves, hence its name. The most common use for x-ray waves is medical purposes X-Ray waves can also be used for CT (Computed Tomography) scans

5. Electromagnetic Waves Gamma Rays: The fastest waves Gamma rays are sometimes used to sterilize medical equipment. Although gamma rays do have cancer causing properties they can also be used to help treat cancer.

6. Mechanical Waves: Waves that need a medium. A flag is the medium for these mechanical waves. Sound waves use the air a s a medium.