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radiation from sun

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Old   May 29, 2008, 10:07
Default radiation from sun
  #1
mettler
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If I wanted to calculate how hot (worse case scenerio) a piece of metal just outside the earth's atmosphere would get due only to the sun's radiation I used:

q = sigma * emiss * (Tsun^4 - Tmetal^4)

knowing q = 1367 W/m^2 Tsun - 6000K assuming emiss = 1 for black body

I am getting a really hot piece of metal - 4236K

did I miss something?

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