1. 1. Review: what are the parameters of a wave?
crest
wavelength
amplitude
trough

2. 2. Three Types of waves Longitudinal  particle motion is parallel
Transverse  particle motion is perpendicular

3. Surface  only on surface – particle motion is circular

4. What does frequency change sound like?
3. Sound waves
As intensity (amplitude) is increased then the sound gets ___________________.
As frequency is increased then the sound gets _______________________.
louder
Higher pitched
What does frequency change sound like?

5. 4. Doppler Effect
Change in frequency of a wave due to relative motion between source and observer.
A sound wave frequency change is noticed as a change in pitch.

7. Stationary Sound Source
Moving Sound Source
Direction of movement
Expanded = lower frequency
Compressed = higher frequency

8. 5. Doppler Effect for Light Waves
Change in frequency of a wave due to relative motion between source and observer.
A light wave change in frequency is noticed as a change in “color”.
The Doppler Effect will cause shifts in frequency causing color shifts as:
Object coming toward = Blue Shift
Object moving away = Red Shift

10. 6. Electromagnetic Spectrum
Let’s watch the video and fill in our notes as we go!

11. 8. Speed of light Given: c= 300,000,000m/s l = 3.0 m Rearrange:
c = l f
speed of light = wavelength x frequency
c = 300,000,000 m/s
A radio station broadcasts a radio wave with a wavelength of 3.0 meters. What is the frequency of the wave?
Given:
c= 300,000,000m/s l = 3.0 m
Rearrange:
c = l f f = c/l
Plug & Solve: f = 300,000,000/3 f = 100,000,000 Hz

12. 9. Complete the practice questions and we will review them.
Then you can begin on your homework! Directed readings 18.1/18.2