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Definition of the noun absorptivity

What does absorptivity mean as a name of something?

noun - plural: absorptivities

  1. (physics) the property of a body that determines the fraction of the incident radiation or sound flux absorbed or absorbable by the body

Alternative definition of the noun absorptivity


  1. The quality of being absorptive; absorptiveness.
  2. (analytical chemistry) The constant a in the Beer's law relation A = abc, where A is the absorbance, b the path length, and c the concentration of solution. Also known as absorptive power. Formerly known as absorbency index; absorption constant; extinction coefficient.
  3. (thermodynamics) The fraction of radiation absorbed by a surface to the total radiation incident on the surface.

Printed dictionaries and other books with definitions for absorptivity

Click on a title to look inside that book (if available):

Google previewTailored Light 2 (2011)

Laser Application Technology by Reinhart Poprawe

The absorptivity is the ratio of power that is deposited within the workpiece and the power of the incident radiation:...

The above-defined absorptivity is a global value that in general contains no information about where in the workpiece the ...

Google previewQuantitative Spectroscopy: Theory and Practice (2003)

by Brian C. Smith

Now, the absorptivity is a fundamental physical constant of a molecule. If that is the case,

Google previewSensors (2013)

An Introductory Course by Kourosh Kalantar-zadeh

Molar absorptivity is a characteristic of a substance and indicates the amount of light absorbed at a particular wavelength. The Beer—Lambert...

Knowing the absorptivity is an important first step in spectroscopic techniques. By subtracting this ...

Google previewFundamentals of Fourier Transform Infrared Spectroscopy (1995)

by Brian C. Smith

The absorptivity is the proportionality constant between concentration and absorbance. it changes from wavenumber to...

Google previewThe Optics of Life (2012)

A Biologist's Guide to Light in Nature by Sönke Johnsen

We introduced absorptivity in chapter 3 when discussing black body ra- diation. Absorptivity is a dimensionless number between zero and one that tells you what fraction of the incident radiation is absorbed. it is a property ofa whole object, ...

Google previewPharmaceutical and Medical Applications of Near-Infrared Spectroscopy, Second Edition (2014)

by Emil W. Ciurczak, Benoit Igne

The low absorptivity is a primary reason for the usefulness of the method for analysis of intact dosage forms. These absorbance arise from C–H, O–H, and N– H bonds. The earliest publications of NIR assays of pharmaceuticals appeared in the ...

Google previewFoundations of Information and Knowledge Systems (2012)

7th International Symposium, FoIKS 2012, Kiel, Germany, March 5-9, 2012, Proceedings by Thomas Lukasiewicz, Attila Sali

Absorptivity is a natural constraint that basically requires the attributes of a merged record be formed as the union of the original values. Note that it is easy to give examples with no absorption, for example the one in ...

Google previewAn Introduction to Environmental Biophysics (2012)

by Gaylon S. Campbell, John M. Norman

For total solar radiation, absorptivity is the mean of the values for PAR and NIR, so o's = 0.5. 15.5 Reflection of Light by Plant Canopies For a canopy of randomly located, ...

Google previewThe Retina and its Disorders (2011)

by Joseph Besharse, Dean Bok

Absorptivity is a characteristic of the medium, that is, the photopigment. Its numerical value depends on the unit of length. Spectral sensitivity – The inverse of the radiant power of a monochromatic stimulus of wavelength l that produces a ...

Google previewOpen Tubular Capillary Electrochromatography-laser Induced Fluorescence for the Separation and Detection of Proteins and Amino Acids (2007)

High absorptivity means the molecule is more likely to be excited at a given illumination intensity, meaning it will be considered a good chromophore.14 Fluorescence ...

Google previewChambers's Encyclopædia (1892)

Here emissivity is the emissive power of the chosen body compared with that of the ideal black body ; and similarly absorptivity is the ratio of the absorptive powers of the chosen body and the black body for the same radiation at the same ...

Google previewSolar Energy Engineering (2009)

Processes and Systems by Soteris A. Kalogirou

Absorptivity is the property of absorbing radiation, possessed by all materials to varying extents. Absorption air conditioning Achieve a cooling effect through the absorptiondesorption process without the requirement of large shaft work input.

Google previewChambers's Encyclopaedia (1901)

A Dictionary of Universal Knowledge

Here emissivity is the emissive power of the chosen body compared with that of the ideal black body ; and similarly absorptivity is the ratio of the absorptive powers of the chosen body and the black body for the same radiation at the same ...

Google previewAnalytical Chemistry Refresher Manual (1992)

by John Kenkel

The greatest analytical sensitivity occurs at the wavelength at which the absorptivity is a maximum. This is the same wavelength that displays the maximum absorbance in the molecular absorption spectrum for that species. In fact, the ...

Google previewEncyclopedia of Spectroscopy and Spectrometry (2010)

The molar absorptivity, ɛ , (also known as the molar absorptivity coefficient or molar extinction coefficient) is a constant for a given molecule at a given wavelength and, as concentration is usually given in mol dm −3 and pathlength in cm, ...

Google previewComprehensive Dictionary of Chemical Engineering (2015)

by Muhammad Rashid Usman

Absorptivity: When thermal radiations fall upon a body, a fraction of the radiant energy is absorbed by the body, fraction is reflected back into the surroundings, and the rest is transmitted through the body. The fraction of the incident ray that is ...

Google previewEncyclopedia of the Eye, Four-Volume Set (2010)

by Joseph Besharse, Reza Dana

is the spectral absorptivity, then, for a homogeneous isotropic absorbing medium, A(λ) = la(λ) (Lambert's law). Spectral absorptance α(λ) Ratio of the spectral radiant flux absorbed by a layer to the spectral radiant ...

Google previewEncyclopedia of Environmental Science and Engineering, Fifth Edition, Volumes One and Two (2006)

by James R. Pfafflin, Edward N. Ziegler

path length of the sample cell, b, and its absorbance units, Ab, is expressed as follows: molar absorptivity, e Ab/(b,cm)(C, moles/L) (9) absorptivity, a Ab/(b,cm)(C , g/L). (10) The absorptivity, a, can be expressed in a number of concentration ...

Google previewCommunications Standard Dictionary (2012)

by Martin H. Weik

absorptivity 5 is converted into energy of other forms, usually heat, within the transmission medium, with the resultant attenuation of the intensity of the light beams. See atomic defect absorption; band edge absorption; bulk material absorption; ...

Google previewDictionary of Pure and Applied Physics (2000)

by Dipak Basu

Here a is called the absorptivity (unit: liters per gram-cm). IfC is in units of moles per liter, e is called the molar absorptivity (unit: liter per mole-cm). absorption ...

Google previewEncyclopedia of Chromatography (Print) (2001)

by Jack Cazes

a is the molar absorptivity (AU/cm/A/), b is the capillary diameter or optical path length (cm), and CLOD is ...

Google previewThe Facts on File Dictionary of Forensic Science (2009)

by Suzanne Bell

This relationship is summarized as Beer's law: A = εbc where ε is the molar absorptivity, b is the path length, and c is concentration. Many spectrophotometric techniques used in forensic science take advantage of this relationship to determine ...

Google previewThe Encyclopedia of Physics (2013)

by Robert Besancon

In heat transfer calculations, it can therefore usually be assumed that the transmissivity of such substances is equal to zero and that reflectivity and absorptivity are connected to the temperature of the interface. One talks then often in a ...

Google previewDictionary of Converting (2012)

by M. R. Chamberlain, J. F. Bowler

Absorptivity. The fraction of the incident radiation which is absorbed by the surface on which it falls. Emissivity. A ratio which compares the radiating capability of a surface tothat of an ideal radiator or 'black body' at the same temperature.

Google previewMosby's Pocket Dictionary of Medicine, Nursing & Health Professions - Elsevieron VitalSource (2016)

by Mosby

absorption spectrum, a plot of percent transmittance, absorbance, logarithm of absorbance, or absorptivity of a ...

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Video about absorptivity

Absorptivity Meaning

Video shows what absorptivity means. The quality of being absorptive; absorptiveness.. The fraction of radiation absorbed by a surface to the total radiation ...

Quotes about absorptivity

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Scrabble value of A1B3S1O1R1P3T1I1V4I1T1Y4

The value of this 12-letter word is 22 points, but it's not an accepted word in the Official Scrabble Players Dictionary.

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