| Dictionary, Encyclopedia and Thesaurus - The Free Dictionary 3,899,040,828 visitors served. |
Dictionary/ thesaurus | Medical dictionary | Legal dictionary | Financial dictionary | Acronyms | Idioms | Encyclopedia | Wikipedia encyclopedia | ? |
Absorptivity |
Also found in: Dictionary/thesaurus, Medical, Wikipedia | 0.01 sec. |
|
|
absorptivity [əb‚sȯrp′tiv·əd·ē]
(analytical chemistry) The constantain the Beer's law relationA=abc,whereAis the absorbance,bthe path length, andcthe concentration of solution. Also known as absorptive power. Formerly known as absorbency index; absorption constant; extinction coefficient. (thermodynamics) The ratio of the radiation absorbed by a surface to the total radiation incident on the surface. Absorptivity (or absorptive power), αv, the fraction of a monochromatic radiation flux of frequency v that is absorbed by a body on which the flux is incident. Although often called the absorption factor, it differs from the absorption factor in that it applies only to radiation of a specific frequency. The absorption factor is the integral of the absorptivities over all the frequencies present in the irradiating flux. The absorptivity for thermal radiation is dependent not only on the frequency or wavelength of the radiation but also on the temperature T of the body: α = α(ν, T) = α*(λ, T) REFERENCELandsberg, G. S. Optika, 4th ed. Moscow, 1957. (Obshchii kurs fiziki, vol. 3.)Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
|
| Encyclopedia |
| Free Tools: |
For surfers:
Free toolbar & extensions |
Word of the Day |
Help
For webmasters: Free content | Linking | Lookup box | Double-click lookup |
|---|