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Irradiance

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irradiance [i′rād·ē·əns]
(electromagnetism)
radiant flux density
irradiance
The density of the luminous flux which is incident on a surface.
Irradiance 

(at a point of a surface), the ratio of the radiant flux incident upon a small surface element containing the point being considered to the area of the surface element. In meteorology and actinometry, this quantity is also called radiation intensity. Units of irradiance are watts per square meter and calories per square centimeter per minute.
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To love thou blam'st me not, for love thou saist Leads up to Heav'n, is both the way and guide; Bear with me then, if lawful what I ask; Love not the heav'nly Spirits, and how thir Love Express they, by looks onely, or do they mix Irradiance, virtual or immediate touch?
Paradise Lost by Milton, John View in context
 
 
 
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