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  1. Wikipedia
    https://en.wikipedia.org › wiki › Irradiance

    Irradiance - Wikipedia

    • In radiometry, irradiance is the radiant flux received by a surface per unit area. The SI unit of irradiance is the watt per square metre (symbol W⋅m or W/m ). The CGS unit erg per square centimetre per second (erg⋅cm ⋅s ) is often used in astronomy. Irradiance is often called intensity, but this term is avoided in radiometry where such usage leads to confusion … See more

    Mathematical definitions

    Irradiance of a surface, denoted Ee ("e" for "energetic", to avoid confusion with photometric quantities), is … See more

    Property

    Irradiance of a surface is also, according to the definition of radiant flux, equal to the time-average of the component of the Poynting vector perpendicular to the surface:
    where … See more

    Point source

    A point source of light produces spherical wavefronts. The irradiance in this case varies inversely with the square of the distance from the source.
    where
    • r … See more

    Solar irradiance

    The global irradiance on a horizontal surface on Earth consists of the direct irradiance Ee,dir and diffuse irradiance Ee,diff. On a tilted plane, there is another irradiance component, Ee,refl, which is the componen… See more

    Irradiance - Science Facts
    Irradiance is the amount of radiant power per unit area received from a radiation source. Learn how to calculate irradiance, its types, and its applications in solar energy, climate science, agricu…
    Science Facts · https://www.sciencefacts.net/irr…
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    Table of Contents
    Mathematical definitions
    Property
    Point source
    Solar irradiance
     

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