Tag Articles : Radiation

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  What Factors Influence the Emissivity of a Material?

  Tuesday, August 27, 2019 | Manfred Hayk

  Application

  There are several factors which influence the emissivity of a material. We need to be aware of their effect on emissivity values.

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  What is Emissivity?

  Monday, August 5, 2019 | Fiona Turner

  Application

  The emissivity of a material, usually denoted as ε, is the ratio of the energy radiated by the material to the energy radiated by a black body at the same temperature. It is a measure of a material’s ability to absorb and radiate energy. A true black body would have an ε = 1 while any real object would have ε < 1. Emissivity is a numerical value and does not have units.

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