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Unformatted text preview: • Short wavelengths>Higher frequency>More Energy>Higher Temperature • Total energy flux of any blackbody: Ftot = 6T^4 (T=temp, 6= 5.67 * 10^8) • SUN Ftot = 6.0 * 10^7 w/m2 (watts per meter squared) • EARTH Ftot = 1370 w/m2 (watts per meter squared) INVERSE SQUARE LAW • So (Ro/R)^2 = S (So=sun's energy flux, Ro=sun's radius, S=total energy emitted by sun) • The farther from the sun, the less energy received • Triple the distance from the sun > 1/9 the original energy • Double the distance from the sun > 1/4 the original energy ENERGY BALANCE OFF EARTH • Ein = Eout • S/4 (1A) = ? 6(Te^4) (S=1370, A=.3, 6=5.67*10^8, Te=18 C) • shorter wavelength>higher frequency>more energy>higher temperature • HOT BODY RADIATES MORE ENERGY AT SHORTER WAVELENGTHS...
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 Spring '99
 Eigenbrode
 Energy, Light, 7 meters, short wavelengths

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