Search results
Results From The WOW.Com Content Network
Crepuscular rays are noticeable when the contrast between light and dark is most obvious. Crepuscular comes from the Latin word crepusculum, meaning "twilight". [2] Crepuscular rays usually appear orange because the path through the atmosphere at dawn and dusk passes through up to 40 times as much air as rays from a high Sun at noon.
Crepuscular rays are noticeable when the contrast between light and dark is most obvious. Crepuscular comes from the Latin word "crepusculum", meaning twilight. [4] Crepuscular rays usually appear orange because the path through the atmosphere at sunrise and sunset passes through up to 40 times as much air as rays from a high midday sun.
These rays stream through gaps in clouds, or trees or other objects. The rays are beams of sunlit air, which are separeted by dark shadowed regions. These shadowed regions could be shadows of clouds, trees or any other object. The image shows that the rays are actually three dimensional shafts of sunlit air.
Although the solar corona is a source of extreme ultraviolet and X-ray radiation, these rays make up only a very small amount of the power output of the Sun (see spectrum at right). The spectrum of nearly all solar electromagnetic radiation striking the Earth's atmosphere spans a range of 100 nm to about 1 mm (1,000,000 nm).
The most usual form, often called sun in splendour or in his glory, consists of a round disc with the features of a human face surrounded by twelve or sixteen rays alternating wavy and straight. [2] [3] The alternating straight and wavy rays are often said to represent the light and heat of the sun respectively. [4]
The length from the center of the white sun to the top of a white ray with a pointed angle is twice the length of the radius of the white sun. The width of the blue ring between the white sun and the 12 white rays with pointed angles is equivalent to 1/15 of the diameter of the white sun.
The Vergina Sun proper has sixteen triangular rays, while comparable symbols of the same period variously have sixteen, twelve, eight or (rarely) six rays. The name "Vergina Sun" became widely used after the archaeological excavations in and around the small town of Vergina , in northern Greece , during the late 1970s. [ 1 ]
It consists of rays or "beams" radiating out from a central disk in the manner of sunbeams. [1] Sometimes part of a sunburst, a semicircular or semi-elliptical shape, is used. Traditional sunburst motifs usually show the rays narrowing as they get further from the centre; from the later 19th century they often get wider, as in the Japanese ...