Weather phenomenon - Halo/ Sundog/ 5. suns

A halo (ἅλως; also known as a nimbus or Gloriole) is a ring of light that surrounds an object. Halos, also known as icebows, are optical phenomena that appear near or around the Sun or Moon, and sometimes near other strong light sources such as street lights. There are many types of optical halos, but they are mostly caused by ice crystals in cold cirrus clouds located high (5--10 km, or 3--6 miles) in the upper troposphere. The particular shape and orientation of the crystals is responsible for the type of halo observed. Light is reflected and refracted by the ice crystals and may split up into colors because of dispersion, similarly to the rainbow. Sometimes in very cold weather optical halos are formed by crystals close to ground level, called diamond dust. The crystals behave like jewels, refracting and reflecting sunlight between their faces, sending shafts of light in particular directions. Atmospheric phenomena such as halos were used as an empirical means of weather forecasting before meteorology was developed. Other common optical phenomena involving water droplets rather than ice crystals include the glory and the rainbow. http://en.wikipedia.org/wiki/H... ///////////////////////////// ////////// Halos (Singular: der Halo; Plural: Halos oder Halogone) sind Lichteffekte der atmosphärischen Optik, die durch die Brechung und Spiegelung des Lichts an Eiskristallen entstehen. Halos entstehen meist in den Eiskristallen hoher Cirrusfelder. Sie können aber im Winter auch in Polarschnee ("diamond dust"), Eisnebel oder durch Eiskristalle in der Nähe von Schneekanonen auftreten. Am häufigsten werden Halos bei Tag (um die Sonne) beobachtet, aber auch um den Mond lassen sich Haloeffekte beobachten. Allerdings ist das menschliche Auge bei geringer Lichtintensität kaum in der Lage Farben wahrzunehmen, weshalb die schwächeren Mondhalos weiß erscheinen. http://de.wikipedia.org/wiki/H... Music: "Everything All of the Time" by Jakob

Channel: Travel & Events
Uploaded: October 2, 2007 at 3:55 am
Author: BlueTreeArrangement

Length: 00:55
Rating: 4.88
Views: 8301

Tags: dog  halo  phenomenon  sonne  sonnen  sun  sundog  suns  weather  

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