Einstein (unit)
From Wikipedia, the free encyclopedia
 |
This article does not cite any references or sources. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. (December 2009) |
An einstein is a unit defined as one mole (6.022×1023) of photons, regardless of their frequency. For photons of a given wavelength, einsteins per square metre is a measure of irradiance.
The einstein is used in studies of photosynthesis since the light requirement for the production of a given quantity of oxygen is a fixed number of photosynthetically active photons. Photosynthetically active radiation (PAR) is usually reported in microeinsteins per second per square meter (μE/m2/sec).
 |
This physics-related article is a stub. You can help Wikipedia by expanding it. |
