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Intensity vs Fluence - What's the difference?

intensity | fluence |

In physics terms the difference between intensity and fluence

is that intensity is time-averaged energy flux (the ratio of average power to the area through which the power "flows"); irradiance while fluence is a measure of particle flux (or that of a pulse of electromagnetic radiation).

As nouns the difference between intensity and fluence

is that intensity is the quality of being intense while fluence is fluency.

intensity

English

Noun

(intensities)
  • the quality of being intense
  • the degree of strength
  • (physics) time-averaged energy flux (the ratio of average power to the area through which the power "flows"); irradiance
  • (optics) can mean any of radiant intensity, luminous intensity or irradiance
  • (astronomy) syn. radiance
  • (geology) The severity of an earthquake in terms of its effects on the earth's surface, and buildings. The value depends on the distance from the epicentre, and is not to be confused with the magnitude.

    • fluence

    English

    Etymology 1

    (wikipedia fluence) From (etyl) fluence.

    Noun

    (en noun)
  • (obsolete) Fluency.
    • a voluble and smart fluence of tongue — Milton.
  • (physics) A measure of particle flux (or that of a pulse of electromagnetic radiation).

    • Etymology 2

    Shortened form of influence.

    Noun

    (en noun)
  • A magical or mysterious force; hypnotic power; energy.
  • * 1974 , (GB Edwards), The Book of Ebenezer Le Page , New York 2007, p. 191:
    • I don't say she would have done anything, if it had come to the point; but the fluence was on, and she got me hot.