1. How do waves travel

2. Different types of Waves travel differently through different materials
Sound waves travel fastest through solids, like metals.
require a medium so they do NOT travel through space
Electromagnetic waves travel fastest through a vacuum, like space.
do not require a medium so they DO travel through space

3. reflection
Occurs when a wave strikes an object and bounces off of it

4. refraction
The bending of a wave as it changes speed in moving from one medium to another

5. diffraction
Occurs when an object causes a wave to change direction and bend around it

6. interference
When two or more waves overlap and combine to form a new wave

7. Absorption
This occurs when a wave hits a object and the object absorbs some of the Energy.
This means the Energy reflected back is weaker
It can also show through white light
Think of a T-shirt, if you are standing outside in white light
and your shirt is green. The reason it appears green is
because the shirt absorbs all the visible wavelengths of light
EXCEPT green. Green is being reflected back to your eyes.
Why would your shirt appear white?
Why would your shirt appear black?

8. Hearing Test
The Doppler effect
The change in pitch (wave frequency) due to a moving wave source