1. What is the frequency of a wave that has a wavelength of 250 m and a speed of 4230 m/s?
Vw = f l
Vw = 4230 m/s
4230m/s =f 250m
l = 250 m
4230m/s = f 250m
16.92Hz =f
16.92/s =f

2. Today’s Objective:
I understand the characteristics of the electromagnetic spectrum.

4. Need a medium to move through
Mechanical Waves:
Need a medium to move through
Transverse
Longitudinal

5. Did you see that?
15 min

6. What's the common factor?

7. Electromagnetic waves:
On to…
Electromagnetic waves:
Waves of energy that are made up of changing electric and magnetic fields
Hyperlink the wave for a video

8. Electromagnetic Waves:
* Transverse waves: moves perpendicular to the direction the energy is traveling

9. Electromagnetic Waves:
* Do not NEED a material to travel through
* Termed radiation when traveling through space

10. electromagnetic waves
The speed of ALL
electromagnetic waves
in a vacuum is
3.00 X 108 meters per second

11. Why do you see the lightning before
the thunder?

12. ‎Speed of Light:
671,000,000 mph
Speed of Sound:
768 mph

13. Did you see the difference?20

14. Waves arranged in order of wavelength & frequency
Electromagnetic Spectrum:
Waves arranged in order of wavelength & frequency

15. Greater frequency = more energy =
Not
Dangerous
Greater frequency = more energy =
more dangerous
Roy G. Biv
Dangerous

18. What do you notice about the waves of the water as they move away from the duck?

19. What happens to the sound of an ambulance as it passes by?

20. Nobody Says It Better....

21. Doppler Effect: Apparent change in frequency of waves

23. Changes In Waves

24. Constructive interference
Term describing the combining of 2 or more waves to create a greater amplitude.
Constructive interference

25. So what’s happening here?
Term that describes a
wave bending from
entering a new medium
So what’s happening here?
Refraction

26. Trevor works at a radio station broadcasts a radio wave with a wavelength of 3.0 meters. What is the frequency of the wave?