1. Electromagnetic SpectrumAM
Shortwave TV FM
Radar & microwaves
Infrared Rays
Ultraviolet Rays
X-rays
Gamma Rays
104 m
102 m
1 m
10-2 m
10-4 m
10-6 m
10-8 m
10-10 m
10-12 m
10-14 m
Increasing Wavelength
Increasing Frequency
Visible Spectrum
ROY G BIV

2. E = h   h = Planck’s Constant h = 6.626  10-34 Js Light and Energy
The energy of light depends on its frequency/wavelength:
Max Plank
h = Planck’s Constant
h =  Js
(Know this number!)

3. Electromagnetic SpectrumAM
Shortwave TV FM
Radar & microwaves
Infrared Rays
Ultraviolet Rays
X-rays
Gamma Rays
104 m
102 m
1 m
10-2 m
10-4 m
10-6 m
10-8 m
10-10 m
10-12 m
10-14 m
Increasing Wavelength
Increasing Frequency
Increasing Energy
E = h
Visible Spectrum
ROY G BIV

4. Energy Comparison EFM < Egreen light Visible green light:
 = 6.0  1014 Hz
E = h
E =  Js  (6.0  /s)
E = 4.0  J
EFM < Egreen light
FM Radio:
 = 94.5  106 Hz
E = h
E =  Js  (94.5  106 1/s)
E = 6.63  J