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Absorption and reflectance spectrums

  1. Jun 28, 2008 #1
    hey,

    just wondering, what's the relationship between absorption and emissions spectra (i.e. would they absorb and reflect the same wavelengths or complement wavelengths of radiation?)

    thanx,

    hechnal
     
  2. jcsd
  3. Jun 28, 2008 #2

    Redbelly98

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    Light that strikes an object is either:
    1. Absorbed
    2. Reflected
    or
    3. Transmitted

    These must all add up to 100%:

    A + R + T = 100%

    For opaque objects, T=0 (no transmission) and the equation simplifies somewhat.
     
  4. Jun 28, 2008 #3

    mathman

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    For a particular substance, they are the same. It depends on the temperature of the medium relative to the light coming through. Hotter leads to emission, colder leads to absorption.
     
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