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Electromagnetic Spectrum
AM 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
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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!)
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Electromagnetic Spectrum
AM 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
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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
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