1. The Electromagnetic Spectrum
Contents:
The Spectrum
Basic Concepts
Whiteboards

2. The electromagnetic spectrum
TOC

3. Radio Waves
Microwaves
Infra-red
Light,
Ultra-violet
X-rays
Fight fight fight!
Gamma Rays
….?
Yeah!
Go Physics!!!!!!

4. Basic Concepts v = f v = c = speed of light = 3.00 x 108 m/s
f = frequency (Hz)
 = wavelength (m)
1 nm = 1 x 10-9 m
TOC

5. Electromagnetic Spectrum
Whiteboards:
Electromagnetic Spectrum
1 | 2 | 3
TOC

6. What is the wavelength of a 91.1 MHz radio wave? (2)
v = f
1 MHz = 1 x 106 Hz
 = v/f = (3.00 x 108 m/s)/(91.1 x 106 Hz) = 3.29 m W
3.29 m

7. What is the frequency of a 12.2 cm microwave? (ovens use this)
v = f
f = v/ = (3.00 x 108 m/s)/(.122 m) = 2.46 x 109 Hz W
2.46 x 109 Hz

8. What is the frequency of a 600. nm light wave?
v = f
1 nm = 1 x 10-9 m
f = v/ = (3.00 x 108 m/s)/(600. x 10-9 m) = 5.00 x 1014 Hz W
5.00 x 1014 Hz