Darkening

Darkening may refer to:

  • Darkening (ophthalmology), vision loss or weakness that occurs without an apparent lesion affecting the eye
  • Darkening of Valinor, the destruction of the Two Trees of Valinor in in the fictional universe of J. R. R. Tolkien's Middle-earth
  • Gravity darkening, an astronomical phenomenon
  • Hydrogen darkening, a physical degradation of the optical properties of glass
  • Limb darkening, the diminishing of intensity in the image of a star as one moves from the center to the edge

Other articles related to "darkening":

Hydrogen Darkening
... Hydrogen darkening is a physical degradation of the optical properties of glass ... The darkening of the fiber can distort the DTS reading and possibly render the DTS system inoperable due to the optical loss budget being exceeded ... Optics Achromat Dispersion Gradient-index optics Hydrogen darkening Optical amplifier Optical fiber Optical lens design Photochromic lens Photosensitive glass Refraction ...
Shuswap Language - Phonology - Vowels - Automatic Vowel Darkening
... vowels, /e/, /i/, and /u/, are subject to an automatic process called darkening, which changes how these vowels are pronounced ... Automatic darkening is predictable it occurs before uvular obstruents and before or after uvularized sonorants ...
Melasma Suprarenale
... Melasma suprarenale is Latin, meaning literally "darkening, (of) above the kidneys" which signifies that it is caused by disease in the adrenal glands (also known as "suprarenal ... The condition most commonly causing the darkening of skin is known as Addison's disease ... The darkening may be brown or reddish, typically appearing in the creases of the palms, pressure areas of the body and the mouth ...
Tethys (moon) - Surface Features - Color Patterns
... This darkening is responsible for the hemispheric albedo asymmetry mentioned above ... is approached, although without any noticeable darkening ... This coloration and darkening of the Tethyan surface is typical for Saturnian middle-sized satellites ...

Famous quotes containing the word darkening:

    The only asylum
    Was the poorhouse, and those who could afford,
    Rather than send their folks to such a place,
    Kept them at home; and it does seem more human.
    But it’s not so: the place is the asylum.
    There they have every means proper to do with,
    And you aren’t darkening other people’s lives....
    Robert Frost (1874–1963)

    But all is changed, that high horse riderless,
    Though mounted in that saddle Homer rode
    Where the swan drifts upon a darkening flood.
    William Butler Yeats (1865–1939)

    One man walking a deserted platform;
    Dawn coming, and rain
    Driving across a darkening autumn....
    Philip Larkin (1922–1986)