アインシュタイン (単位)
1. Einstein (unit)An einstein is a unit defined as one mole (6.022×10) 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/m/sec).
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Read “Einstein (unit)” on English Wikipedia
Read “アインシュタイン (単位)” on Japanese Wikipedia
Read “Einstein (unit)” on DBpedia
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