Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun The ratio of the radiation emitted by a surface to the radiation emitted by a blackbody at the same temperature.

from The Century Dictionary.

  • noun Emissive or radiating power.
  • noun Specifically A physical constant by means of which the power of radiation of a body is quantitatively expressed.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Physics) Tendency to emission; comparative facility of emission, or rate at which emission takes place

from Wiktionary, Creative Commons Attribution/Share-Alike License.

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

Etymologies

Sorry, no etymologies found.

Examples

  • The amount of blackbody energy emitted is strictly and solely a function of the thermal temperature of the substance, mitigated by the characteristic of the substance called emissivity (which can, as you say, by frequency dependent).

    RealClimate

  • The amount of blackbody energy emitted is strictly and solely a function of the thermal temperature of the substance, mitigated by the characteristic of the substance called emissivity (which can, as you say, by frequency dependent).

    RealClimate

  • The amount of blackbody energy emitted is strictly and solely a function of the thermal temperature of the substance, mitigated by the characteristic of the substance called emissivity (which can, as you say, by frequency dependent).

    RealClimate

  • The amount of blackbody energy emitted is strictly and solely a function of the thermal temperature of the substance, mitigated by the characteristic of the substance called emissivity (which can, as you say, by frequency dependent).

    RealClimate

  • The amount of blackbody energy emitted is strictly and solely a function of the thermal temperature of the substance, mitigated by the characteristic of the substance called emissivity (which can, as you say, by frequency dependent).

    RealClimate

  • Buy double-or triple-pane models, designated Energy Star with a "low E" (for "emissivity") coating.

    Save Energy—And Money

  • Perhaps the most interesting realization is that the concept of reciprocity applies to the ‘kludge’ factor called emissivity – the correction value that permits a greybody to be modeled with planck’s law and stefan’s law – applies to the atmosphere.

    Gerry North's Suggested Reading on Climate Models « Climate Audit

  • Materials commonly used in urban areas for pavement and roofs, such as emissivity than the surrounding rural areas.

    StarTribune.com rss feed

  • I used a black body approximation to the earth’s emissivity, that is, an emissivity of 1.

    USCCSP: Temperature Trends in the Lower Atmosphere « Climate Audit

  • The roof is made of "low emissivity" or "cool" roof materials, so it reflects sunlight rather than absorbing its heat.

    In Bethesda, a home built to have a net-zero carbon footprint

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