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Glory (optical Phenomenon)
A glory is an optical phenomenon, resembling an iconic saint's halo around the shadow of the observer's head, caused by sunlight or (more rarely) moonlight interacting with the tiny water droplets that comprise mist or clouds. The glory consists of one or more concentric, successively dimmer rings, each of which is red on the outside and bluish towards the centre. Due to its appearance, the phenomenon is sometimes mistaken for a circular rainbow, but the latter has a much larger diameter and is caused by different physical processes. Glories arise due to wave interference of light internally refracted within small droplets. Appearance and observation Depending on circumstances (such as the uniformity of droplet size in the clouds), one or more of the glory's rings can be visible. The angular size of the inner and brightest ring is much smaller than that of a rainbow, about 5° to 20°, depending on the size of the droplets. In the right conditions, a glory and a rainbo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IMG 7474 Solar Glory
img or IMG is an abbreviation for image. img or IMG may also refer to: * IMG (company), global sports and media business headquartered in New York City but with its main offices in Cleveland, originally known as the "International Management Group", with divisions including: ** IMG Academy, an athletic training complex in Bradenton, Florida with facilities for multiple sports ** IMG Artists, a performing arts management company with multiple worldwide offices ** IMG College, a college sports marketing agency based in Winston-Salem, North Carolina ** IMG Models, a modeling agency based in New York * IMG (file format), the file extension of several different disk image formats which store a full digital representation (image) of disk drive or storage media * IMG, a prefix for camera image file names commonly used in Design rule for Camera File system * mg/code>, a tag used in BBCode to place an image * , an HTML element used to place an image; see * IMG Worlds of Adventure, the l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brocken Spectre
A Brocken spectre (British English; American spelling Brocken specter; german: Brockengespenst), also called Brocken bow, mountain spectre, or spectre of the Brocken is the magnified (and apparently enormous) shadow of an observer cast in mid air upon any type of cloud opposite a strong light source. Additionally, if the cloud consists of water droplets backscattered, a bright area called , and Halo (optical phenomenon), halo-like rings of rainbow coloured light called a glory (optical phenomenon), glory can be seen around the head or apperature silhouette of the spectre. Typically the spectre appears in sunlight opposite the sun's direction at the antisolar point. The phenomenon can appear on any misty mountainside, cloud bank, or be seen from an aircraft, but the frequent fogs and low-altitude accessibility of the Brocken, a peak in the Harz Mountains in Germany, have created a local legend from which the phenomenon draws its name. The Brocken spectre was observed and described ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Classical Wave Tunneling
In electromagnetics, an evanescent field, or evanescent wave, is an oscillating electric and/or magnetic field that does not propagate as an electromagnetic wave but whose energy is spatially concentrated in the vicinity of the source (oscillating charges and currents). Even when there is a propagating electromagnetic wave produced (e.g., by a transmitting antenna), one can still identify as an evanescent field the component of the electric or magnetic field that cannot be attributed to the propagating wave observed at a distance of many wavelengths (such as the far field of a transmitting antenna). A hallmark of an evanescent field is that there is no net energy flow in that region. Since the net flow of electromagnetic energy is given by the average Poynting vector, this means that the Poynting vector in these regions, as averaged over a complete oscillation cycle, is zero. Use of the term In many cases one cannot simply say that a field is or is not "evanescent": Having P ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Herch Moysés Nussenzveig
Herch Moysés Nussenzveig (16 January 1933 – 5 November 2022) was a Brazilian physicist, professor at Universidade Federal do Rio de Janeiro and member of the Brazilian Academy of Sciences. He authored several textbooks, notably the collection ''Curso de Física Básica'' (''Course of Basic Physics''), winner of the Prêmio Jabuti in 1999 on the category ''Ciências Exatas, Tecnologia e Informática'' (Exact Sciences, Technology and Informatics). He was president of the Brazilian Physical Society from 1981 to 1983. Nussenzveig was born in São Paulo on 16 January 1933. He was a PhD student of Guido Beck. Nussenzveig was known, among other things, for explaining effects such as the glory, an optical phenomenon. In 1986, he was the recipient of the Max Born Award. The prize citation reads: "For distinguished and valuable contributions to the theory of Mie scattering and to the theories of the rainbow A rainbow is a meteorological phenomenon that is caused by reflectio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Surface Waves
In physics, a surface wave is a mechanical wave that propagates along the interface between differing media. A common example is gravity waves along the surface of liquids, such as ocean waves. Gravity waves can also occur within liquids, at the interface between two fluids with different densities. Elastic surface waves can travel along the surface of solids, such as '' Rayleigh'' or ''Love'' waves. Electromagnetic waves can also propagate as "surface waves" in that they can be guided along with a refractive index gradient or along an interface between two media having different dielectric constants. In radio transmission, a ''ground wave'' is a guided wave that propagates close to the surface of the Earth. Mechanical waves In seismology, several types of surface waves are encountered. Surface waves, in this mechanical sense, are commonly known as either ''Love waves'' (L waves) or ''Rayleigh waves''. A seismic wave is a wave that ''travels through the Earth, often as the r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hendrik Van De Hulst
Hendrik Christoffel "Henk" van de Hulst (19 November 1918 – 31 July 2000) was a Dutch astronomer and mathematician. In 1944, while a student in Utrecht, he predicted the existence of the 21 cm hyperfine line of neutral interstellar hydrogen. After this line was discovered, he participated, with Jan Oort and C.A. Muller, in the effort to use radio astronomy to map out the neutral hydrogen in our galaxy, which first revealed its spiral structure. Motivated by the scattering in cosmic dust, he studied light scattering by spherical particles and wrote his doctoral thesis on the topic, subsequently formulating the anomalous diffraction theory. He spent most of his career at Leiden University, retiring in 1984. He published widely in astronomy, and dealt with the solar corona, and interstellar clouds. After 1960 he was a leader in international space research projects. In 1956 he became member of the Royal Netherlands Academy of Arts and Sciences. Books *van de Hulst, H.C., ' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Henri Poincaré
Jules Henri Poincaré ( S: stress final syllable ; 29 April 1854 – 17 July 1912) was a French mathematician, theoretical physicist, engineer, and philosopher of science. He is often described as a polymath, and in mathematics as "The Last Universalist", since he excelled in all fields of the discipline as it existed during his lifetime. As a mathematician and physicist, he made many original fundamental contributions to pure and applied mathematics, mathematical physics, and celestial mechanics. In his research on the three-body problem, Poincaré became the first person to discover a chaotic deterministic system which laid the foundations of modern chaos theory. He is also considered to be one of the founders of the field of topology. Poincaré made clear the importance of paying attention to the invariance of laws of physics under different transformations, and was the first to present the Lorentz transformations in their modern symmetrical form. Poincaré disc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Solar Glory From Crib Goch 1
Solar may refer to: Astronomy * Of or relating to the Sun ** Solar telescope, a special purpose telescope used to observe the Sun ** A device that utilizes solar energy (e.g. " solar panels") ** Solar calendar, a calendar whose dates indicate the position of the Earth on its revolution around the Sun * Solar Maximum Mission, a satellite * SOLAR (ISS), an observatory on International Space Station Music * "Solar" (composition), attributed to Miles Davis * ''Solar'' (Red Garland album), 1962 * ''Solar'' (Taeyang album), 2010 * ''Solar'', a 2011 album by Rubik * "Solar", a song by Northlane from ''Mesmer'', 2017 * SOLAR Records, a record label Geography * Solar (Spanish term), a type of urban site * Solar, County Antrim, Northern Ireland, United Kingdom * Solar, Erode, India * Solar, Iran, Iran Companies * Solar Entertainment Corporation, a Philippines television and radio media company * Solar TV, a former TV channel * Solar Television Network, Inc., a former ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Walpurgis Night
Walpurgis Night (), an abbreviation of Saint Walpurgis Night (from the German ), also known as Saint Walpurga's Eve (alternatively spelled Saint Walburga's Eve), is the eve of the Christian feast day of Saint Walpurga, an 8th-century abbess in Francia, and is celebrated on the night of 30 April and the day of 1 May. This feast commemorates the canonization of Saint Walpurga and the movement of her relics to Eichstätt, both of which occurred on 1 May 870. Saint Walpurga was hailed by the Christians of Germany for battling "pest, rabies, and whooping cough, as well as against witchcraft". Christians prayed to God through the intercession of Saint Walpurga in order to protect themselves from witchcraft, as Saint Walpurga was successful in converting the local populace to Christianity. In parts of Europe, people continue to light bonfires on Saint Walpurga's Eve in order to ward off evil spirits and witches. Others have historically made Christian pilgrimages to Saint ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Witches' Sabbath
A Witches' Sabbath is a purported gathering of those believed to practice witchcraft and other rituals. The phrase became popular in the 20th century. Origins In 1668, Johannes Praetorius published his literary work "Blockes-Berges Verrichtung", which has the subtitle "Oder Ausführlicher Geographischer Bericht/ von den hohen trefflich alt- und berühmten Blockes-Berge: ingleichen von der Hexenfahrt/ und Zauber-Sabbathe/ so auff solchen Berge die Unholden aus gantz Teutschland/ Jährlich den 1. Maij in Sanct-Walpurgis Nachte anstellen sollen". As indicated by the subtitle, Praetorius attempted to give a "Detailed Geographical Account of the highly admirable ancient and famous Blockula, also about the witches' journey and magic sabbaths". Emergence in the 20th century Prior to the late 19th century, it is difficult to locate any English use of the term ''sabbath'' to denote a gathering of witches. The phrase is used by Henry Charles Lea in his ''History of the Inquisition of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blocksberg
The Brocken, also sometimes referred to as the Blocksberg, is the highest peak in the Harz mountain range and also the highest peak in Northern Germany; it is near Schierke in the German state of Saxony-Anhalt between the rivers Weser and Elbe. Although its elevation of is below alpine dimensions, its microclimate resembles that of mountains of about . The peak above the tree line tends to have a snow cover from September to May, and mists and fogs shroud it up to 300 days of the year. The mean annual temperature is only . It is the easternmost mountain in northern Germany; travelling east in a straight line, the next prominent elevation would be in the Ural Mountains in Russia. The Brocken has always played a role in legends and has been connected with witches and devils; Johann Wolfgang von Goethe took up the legends in his play ''Faust''. The Brocken spectre is a common phenomenon on this misty mountain, where a climber's shadow cast upon fog creates eerie optical effects. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Goethe's Faust
''Faust'' is a tragic play in two parts by Johann Wolfgang von Goethe, usually known in English as '' Faust, Part One'' and ''Faust, Part Two''. Nearly all of Part One and the majority of Part Two are written in rhymed verse. Although rarely staged in its entirety, it is the play with the largest audience numbers on German-language stages. ''Faust'' is considered by many to be Goethe's ''magnum opus'' and the greatest work of German literature. The earliest forms of the work, known as the ''Urfaust'', were developed between 1772 and 1775; however, the details of that development are not entirely clear. ''Urfaust'' has twenty-two scenes, one in prose, two largely prose and the remaining 1,441 lines in rhymed verse. The manuscript is lost, but a copy was discovered in 1886. The first appearance of the work in print was ''Faust, a Fragment'', published in 1790. Goethe completed a preliminary version of what is now known as ''Part One'' in 1806. Its publication in 1808 was follow ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
_St.Walburga484.JPG "Click for more on -> Walpurgis Night")
