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[ih-mit-ns] /ɪˈmɪt ns/
noun, Optics.
the total flux emitted per unit area.
Origin of emittance
1935-40; emit + -ance Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for emittance
  • The emittance of a material refers to its ability to release absorbed heat.
  • System for infrared spectral emittance of materials.
  • emittance compensation under such compression has to be studied.
  • emittance is frequently reported from reflectance data fitted to blackbody curves.
  • emittance growth in a solenoid channel can occur due to the strong coupling of horizontal and vertical motions.
  • Infrared emittance is a measure of the ability of a surface to emit its energy in the form of heat radiation.
  • High emittance lowers roof temperature by increasing the release of heat by thermal radiation.
  • The infrared emittance of the surface gives the fraction of the maximum possible infrared radiation that the surface reemits.
  • The change in temperature is also related to the thermal emittance of both materials.

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