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Connection between emissivity and albedo

  1. Mar 26, 2012 #1
    I am studying thermal radiation. Does anyone know what is a connection between emissivity and albedo.
  2. jcsd
  3. Mar 26, 2012 #2

    Andy Resnick

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    Albedo is a reflection, so emissivity + albedo = 1, for opaque objects. There's probably some spectral weighting involved in the definition of albedo.
  4. Mar 26, 2012 #3


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    You are confusing emissivity and reflectivity. [No, I'm confusing albedo and absorption. Sorry.]

    Emissivity is equal to albedo at a given wavelength. If they were not equal, the heat could flow from colder object to hotter one via radiation.
    Last edited: Mar 26, 2012
  5. Mar 26, 2012 #4
    I think Andy was correct.

    For non transparent bodies:
  6. Mar 26, 2012 #5


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    Yeah, you're right. I somehow confused albedo and absorption. Emissivity+albedo=1 is correct.
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