Einstein (unit)
The auxiliary unit of measurement Einstein ( unit symbol : E) is sometimes used in photo and biochemistry to indicate the number of light quanta , i.e. photons . One Einstein corresponds to one mole and is therefore nothing other than the numerical value of Avogadro's constant in mol −1 , i.e. i.e., it is about .
Occasionally, however, the unit is also used for the energy of one mole of photons. Because of this ambiguity and because Einstein is not an SI unit , we advise against using this unit.
Similar to percent , radian and bel , the Einstein is also used for the quantitative specification of physical quantities of the dimension number .
Photosynthesis is an example of its use : With a complete yield of the incident sunlight, which is practically impossible, 8 Einstein are required to produce one mole of oxygen , i.e. H. eight photons per molecule . No statement is made about the energy or wavelength of the photons.
The unit is named in honor of Albert Einstein , who in 1905 made the photoelectric effect understandable by formulating the light quantum hypothesis .
Individual evidence
- ↑ a b Entry on Einstein . In: IUPAC Compendium of Chemical Terminology (the “Gold Book”) . doi : 10.1351 / goldbook.E01914 Version: 2.3.3.