Crepuscular Rays sun rays converging on the horizon
Crepuscular rays occur when objects such as mountain peaks or clouds partially shadow the sun's rays.
Crepuscular rays are alternating light and dark sun rays streaming through gaps in clouds.
crepuscular rays"(Also called shadow bands.) Literally "twilight rays," these alternating dark and light bands (shadows and light scattered from sunbeams, respectively) seem to diverge fanlike from the sun's position during twilight.
Crepuscular rays Alternating light and dark bands of light that appear to fan out from the sun's position, usually at twilight.
Crepuscular Rays - the alternating bands of light and dark (rays and shadows) seen at the earth's surface when the sun shines through clouds ...
CREPUSCULAR RAYS Contrasting, alternating bright and dark rays in the sky. Sunlight is scattered by molecules and particles rendering these bright rays visible. Contrast is enhanced by haze, dust, or mist.
CREPUSCULAR RAYS - Effect of sunlight shining through clouds, smoke, or haze where the rays and shadows become visible as lines or streaks through the sky. Commonly seen under breaks in clouds where the sun shines through into hazy air.
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Of Sun Pillars and Diamond Dust
Diamond Dust:
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light by ice crystals suspended in the earth's atmosphere and exhibiting prismatic coloration ranging from red inside to blue outside.
NOAA National Weather Service - Cite This Source - This Definition
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The term is a relative one as to size, some creeks in the humid section would be called rivers if they occurred in the arid portion. Crepuscular RaysThe alternating bands of light and dark (rays and shadows) seen at the earth's surface when the ...
 See also: Air, Light, Atmosphere, Clouds, Cloud
  
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