1. Warm-Up 12/5/13
List 3 different types of electromagnetic radiation that you have been exposed to today.
Identify the source and type

2. The Behavior of Waves
12/5/13

3. Reflection Occurs when a wave strikes and object and bounces off
All wave types reflect
Examples: Seeing yourself in the mirror, echoes

4. Law of Reflection
The angle of incidence is equal to the angle of reflection

5. Refraction
The bending of a wave caused by a change in speed as it moves from one medium to another
Reminder: wave speed depends on the medium!

6. Refraction cont… Wave bends away from the “normal” when it speeds up
Ex) Water to air
Wave bends toward the “normal” when it slows down
Ex) Air to water

7. Different waves bend different amounts because speed depends on wavelength!

8. Diffraction
Occurs when an object causes a wave to change direction and bend around it
Amount depends on size of obstacle compared to wavelength
Example: hearing around corners

9. Diffraction Types Can occur when going through a slit
Can occur when going around an object

10. Your Job
Pg. 512 #1-3, 6-7
QUIZ Tomorrow on EM Waves and the EM Spectrum! (Monday’s notes)