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Sun's Electromagnetic Spectrum
Sun's Electromagnetic Spectrum
Objects emit a radiation “spectrum” (a variety of wavelengths)
The Sun’s emission spectrum peaks around 0.5 μm (visible)
We can see the sun, and the reflection and absorption of solar radiation allows us to see other things
Earth's Electromagnetic Spectrum
Earth's Electromagnetic Spectrum
Earth radiates nearly all its energy between 5 and 25 μm with a peak intensity in the infrared (longwave) radiation region around 10 μm
We can not see infrared radiation, but we have developed instrumentation that can
Army night vision scopes
Weather satellites
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