What does radiance mean?

Definitions for radiance
ˈreɪ di ənsra·di·ance

This dictionary definitions page includes all the possible meanings, example usage and translations of the word radiance.

Princeton's WordNet

  1. radiance, glow, glowingnoun

    the amount of electromagnetic radiation leaving or arriving at a point on a surface

  2. radiance, radiancy, shine, effulgence, refulgence, refulgencynoun

    the quality of being bright and sending out rays of light

  3. radiancenoun

    an attractive combination of good health and happiness

    "the radiance of her countenance"


  1. radiancenoun

    the quality of being radiant, shining, bright or splendid

    Girt with omnipotence, with radiance crowned. uE000197485uE001 Milton.

  2. radiancenoun

    the flux of radiation emitted per unit solid angle in a given direction by a unit area of a source

  3. Etymology: From radiare + -ance

Samuel Johnson's Dictionary

  1. Radiance, Radiancynoun

    Sparkling lustre; glitter.

    Etymology: radiare, Lat.

    By the sacred radiance of the sun,
    By all the operations of the orbs,
    Here I disclaim all my paternal care. William Shakespeare, K. Lear.

    Whether there be not too high an apprehension above its natural radiancy, is not without just doubt; however it be granted a very splendid gum, and whose sparkles may somewhat resemble the glances of fire. Thomas Browne, Vulgar Errours.

    The son
    Girt with omnipotence, with radiance crown’d
    Of majesty divine. John Milton.

    A glory surpassing the sun in its greatest radiancy, which, though we cannot describe, will bear some resemblance. Thomas Burnet, Theory of the Earth.

    The rapid radiance instantaneous strikes
    Th’ illumin’d mountain. James Thomson, Spring.


  1. Radiance

    In radiometry, radiance is the radiant flux emitted, reflected, transmitted or received by a given surface, per unit solid angle per unit projected area. Radiance is used to characterize diffuse emission and reflection of electromagnetic radiation, and to quantify emission of neutrinos and other particles. The SI unit of radiance is the watt per steradian per square metre (W·sr−1·m−2). It is a directional quantity: the radiance of a surface depends on the direction from which it is being observed. The related quantity spectral radiance is the radiance of a surface per unit frequency or wavelength, depending on whether the spectrum is taken as a function of frequency or of wavelength. Historically, radiance was called "intensity" and spectral radiance was called "specific intensity". Many fields still use this nomenclature. It is especially dominant in heat transfer, astrophysics and astronomy. "Intensity" has many other meanings in physics, with the most common being power per unit area.


  1. radiance

    Radiance is a measure of the intensity or brightness of light traveling from or hitting a particular surface or object in a specific direction. It measures the amount of light in watts that falls on an area in square meters from a particular direction in space, per unit of solid angle in steradians. Radiance helps to determine and quantify how much of the observer's field of view is produced by the source light.

Webster Dictionary

  1. Radiancenoun

    alt. of Radiancy


  1. Radiance

    Radiance and spectral radiance are measures of the quantity of radiation that passes through or is emitted from a surface and falls within a given solid angle in a specified direction. They are used in radiometry to characterize diffuse emission and reflection of electromagnetic radiation. In astrophysics, radiance is also used to quantify emission of neutrinos and other particles. The SI unit of radiance is watts per steradian per square metre, while that of spectral radiance is W·sr−1·m−2·Hz−1 or W·sr−1·m−3 depending on if the spectrum is a function of frequency or of wavelength.

Anagrams for radiance »

  1. caridean

  2. dircaean

How to pronounce radiance?

How to say radiance in sign language?


  1. Chaldean Numerology

    The numerical value of radiance in Chaldean Numerology is: 4

  2. Pythagorean Numerology

    The numerical value of radiance in Pythagorean Numerology is: 1

Examples of radiance in a Sentence

  1. Alfred North Whitehead:

    Nature gets credit which should in truth be reserved for ourselves: the rose for its scent, the nightingale for its song; and the sun for its radiance. The poets are entirely mistaken. They should address their lyrics to themselves and should turn them into odes of self congratulation on the excellence of the human mind.

  2. Dag Hammarskjld:

    God does not die on the day when we cease to believe in a personal deity, but we die on the day when our lives cease to be illumined by the steady radiance, renewed daily, of a wonder, the source of which is beyond all reason.

  3. Narendra Modi:

    We will experience the superpower of light, clearly illuminating the common purpose we are all fighting for, in that light, in that luster, in that radiance, let us resolve in our minds that we are not alone, that no one is alone.

  4. Walter Benjamin:

    Separation penetrates the disappearing person like a pigment and steeps him in gentle radiance.

  5. Good Sam:

    I'd let down my guard, let him suck me into the Good Sam story, never fully realizing he might be manipulating me for his own benefit. Jack had that effect on me. Being with Jack was like standing in the midst of a brilliant sunbeam, at once dazzled by its radiance even as you knew it was burning you.”

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Translations for radiance

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"radiance." Definitions.net. STANDS4 LLC, 2024. Web. 21 Jul 2024. <https://www.definitions.net/definition/radiance>.

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