Synonymer & Information om | Engelska ordet ABSORPTIVITY

Exempel på hur man kan använda ABSORPTIVITY i en mening

• In this situation, Kirchhoff's law of equality of radiative emissivity and absorptivity and the Helmholtz reciprocity principle are in play.
• When an isosbestic plot is constructed by the superposition of the absorption spectra of two species (whether by using molar absorptivity for the representation, or by using absorbance and keeping the same molar concentration for both species), the isosbestic point corresponds to a wavelength at which these spectra cross each other.
• Kirchhoff's law has another corollary: the emissivity cannot exceed one (because the absorptivity cannot, by conservation of energy), so it is not possible to thermally radiate more energy than a black body, at equilibrium.
• However, it is typical in engineering to assume that a surface's spectral emissivity and absorptivity do not depend on wavelength so that the emissivity is a constant.
• These properties are the transmissivity "T" , absorptivity "A", emissivity (which is equal to the absorptivity for any given wavelength), and reflectivity all of which are dimensionless quantities that together sum to 1.
• With spectrophotometric data the calculated molar absorptivity (or emissivity) values should all be positive.
• Northrup began experimenting with solar collectors to heat air, using finned heat exchangers, and engaged solar pioneer Professor John Yellott as a consultant on the absorptivity and emissivity or various surfaces and configurations, and on the transparency of various glasses and glazing material that exhibit the "greenhouse effect" - transparent to incoming solar radiation, but opaque to the re-radiation of infrared from the heated surface - hence a thermal trap or collector that exhibits the "greenhouse effect".
• The field underwent a transformation when a team led by Barner-Kowollik and Gescheidt recorded the first modern-day photochemical action plot using a tuneable monochromatic nanosecond pulsed laser system, discovering a strong mismatch between photochemical reactivity and absorptivity and marking a critical advancement in mapping wavelength-dependent conversions in photoinduced polymerizations.

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