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Absorptivity vs Emissivity - What's the difference?

absorptivity | emissivity |

As nouns the difference between absorptivity and emissivity

is that absorptivity is the quality of being absorptive; absorptiveness while emissivity is the energy-emitting propensity of a surface, usually measured at a specific wavelength.

absorptivity

English

Noun

(absorptivities)
  • The quality of being absorptive; absorptiveness.
  • (thermodynamics) The fraction of radiation absorbed by a surface to the total radiation incident on the surface.
  • (analytical chemistry) The constant a in the Beer's law relation A = abc, where A is the absorbance, b the path length, and c the concentration of solution. Also known as absorptive power. Formerly known as absorbency index; absorption constant; extinction coefficient.

    • Synonyms

    * absorption coefficient * absorption factor

    References

    emissivity

    English

    Noun

    (emissivities)
  • (physics) The energy-emitting propensity of a surface, usually measured at a specific wavelength.