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Thread: difference between irradiance and scalar irradiance

  1. #1 difference between irradiance and scalar irradiance 
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    Join Date
    Oct 2009
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    irradiance is defined to be the radiance field multiplied by the cosine of its zenith angle and then integrated over the entire field-of-view of the sensor; scalar irradiance is defined to be the exact thing, but without the cosine term.

    although it seems simple enough, how do we visualise these 2 quantities? can i take irradiance to be the light 'rays' that are passing through the sensor perpendicularly, while the scalar irradiance as all light 'rays' that are passing through the sensor regardless of the orientation?

    any other opinions on this matter?


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