emissivity


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e·mis·siv·i·ty

(ē'mi-siv'i-tē),
The giving off of heat rays; a perfect "black body" has an emissivity of 1, a highly polished metallic surface may have an emissivity as low as 0.02.

emissivity

(ĕm″ĭ-sĭv′ĭ-tē)
The ability of a substance or surface to emit radiant energy.
References in periodicals archive ?
To achieve the same temperature as the first measuring point (thermal equilibrium) and determine the specific emissivity factor, e of the rectangle is modified until the two temperatures are equal [14].
1984) developed two separate models (1 and 2) to predict daytime and nighttime sky emissivity.
Pour warm or hot water into a cup and place a target of known emissivity on the side of the cup such as electrical tape or an IR-ID label
For emissivity measurements, the infrared (IR) spectrometer Nicolet 380 FTIR was used.
Instead, the emissivity of an object is first linked by Stewart's law [5,6] to its reflectivity, before a cavity is ever constructed
The second approach lies in applying a coating layer to a certain value of the emissivity which is close to 1 on the surface of the electronic device [12].
The approach taken in this study is to simplify the model to the essential elements so as to be able to understand the effects of key model parameters with particular emphasis on the emissivity of the surface.
In this section, the differential scattering coefficient and Kirchhoff's law are introduced, which are widely used in the estimation of emissivity [15-17].
The emissivity can also be adjusted either on the sensor itself or remotely using the software provided.
The coating is called Low-E coating, or low thermal emissivity coating.
b] of the park (obtained in some normalized conditions), then R can be interpreted as the emissivity of the roadway segment itself, since the total emission will change according to the particular ambit and driving conditions given by the segment.
In 2008, Jorn Helbert and Nils Muller, Institute of Planetary Research, German Aerospace Center, Berlin and co-authors on this new work, published a map of the variation of infrared emissivity across the southern hemisphere of Venus.