irradiance

English

Noun

irradiance (countable and uncountable, plural irradiances)

  1. The act of irradiating; emission of rays of light.
  2. That which irradiates or is irradiated; lustre; splendour; brilliancy.
  3. (physics) The radiant power received by unit area of surface.
    • 1959, United States. National Aeronautics and Space Administration, NASA Technical Note (issues 3641-3650, page 15)
      The geometry of the cone θ and the irradiance at the image of the carbon block were used to determine the absolute steradiancy of the energy in the cone θ as a radiometer calibration value.

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