Irradiance

//ɪˈɹeɪ.di.əns// noun

Definitions

Noun
  1. 1
    The act of irradiating; emission of rays of light. countable, uncountable
  2. 2
    That which irradiates or is irradiated; lustre; splendour; brilliancy. countable, uncountable
  3. 3
    The radiant power received by unit area of surface. countable, uncountable

    "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."

Etymology

irradiant + -ance

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