1.
United Kingdom
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The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom or Britain, is a sovereign country in western Europe. Lying off the north-western coast of the European mainland, the United Kingdom includes the island of Great Britain, Northern Ireland is the only part of the United Kingdom that shares a land border with another sovereign state—the Republic of Ireland. The Irish Sea lies between Great Britain and Ireland, with an area of 242,500 square kilometres, the United Kingdom is the 78th-largest sovereign state in the world and the 11th-largest in Europe. It is also the 21st-most populous country, with an estimated 65.1 million inhabitants, together, this makes it the fourth-most densely populated country in the European Union. The United Kingdom is a monarchy with a parliamentary system of governance. The monarch is Queen Elizabeth II, who has reigned since 6 February 1952, other major urban areas in the United Kingdom include the regions of Birmingham, Leeds, Glasgow, Liverpool and Manchester. The United Kingdom consists of four countries—England, Scotland, Wales, the last three have devolved administrations, each with varying powers, based in their capitals, Edinburgh, Cardiff and Belfast, respectively. The relationships among the countries of the UK have changed over time, Wales was annexed by the Kingdom of England under the Laws in Wales Acts 1535 and 1542. A treaty between England and Scotland resulted in 1707 in a unified Kingdom of Great Britain, which merged in 1801 with the Kingdom of Ireland to form the United Kingdom of Great Britain and Ireland. Five-sixths of Ireland seceded from the UK in 1922, leaving the present formulation of the United Kingdom of Great Britain, there are fourteen British Overseas Territories. These are the remnants of the British Empire which, at its height in the 1920s, British influence can be observed in the language, culture and legal systems of many of its former colonies. The United Kingdom is a country and has the worlds fifth-largest economy by nominal GDP. The UK is considered to have an economy and is categorised as very high in the Human Development Index. It was the worlds first industrialised country and the worlds foremost power during the 19th, the UK remains a great power with considerable economic, cultural, military, scientific and political influence internationally. It is a nuclear weapons state and its military expenditure ranks fourth or fifth in the world. The UK has been a permanent member of the United Nations Security Council since its first session in 1946 and it has been a leading member state of the EU and its predecessor, the European Economic Community, since 1973. However, on 23 June 2016, a referendum on the UKs membership of the EU resulted in a decision to leave. The Acts of Union 1800 united the Kingdom of Great Britain, Scotland, Wales and Northern Ireland have devolved self-government
2.
Sidney Sussex College, Cambridge
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Sidney Sussex College is a constituent college of the University of Cambridge in England. The college was founded in 1596 under the terms of the will of Frances Sidney, Countess of Sussex and it was from its inception an avowedly Protestant foundation, some good and godlie moniment for the mainteynance of good learninge. In her will, Lady Sussex left the sum of £5,000 together with some plate to found a new college at Cambridge University to be called the Lady Frances Sidney Sussex College. Her executors Sir John Harington and Henry Grey, 6th Earl of Kent, supervised by Archbishop John Whitgift, as of 2014, the college had an endowment of £36. m. and total capital and reserves of £108. m. By the early 19th century, the original red brick was unfashionable. H. Lyon, and somewhat at odds with the colleges original Puritan ethos, at the beginning of the twentieth century, E. H. Griffiths wrote a ten verse song dedicated to Sidney Sussex, each verse systematically identifies, then dismisses other Cambridge colleges for their faults, before settling on Sidney as the best college of all. Sidney Sussex is recognised as one of the smaller, more classical Cambridge colleges and its current student body consists of roughly 350 undergraduate students and 190 graduates. Academically, Sidney Sussex has tended towards a position in the unofficial Tompkins Table. However, the college has traditionally excelled in subjects, notably Mathematics, History, Engineering. It is also known for the standard of pastoral support from the Tutorial team. The college ranks fourth highest amongst Cambridge colleges in Nobel Prizes won by alumni, the Choir of Sidney Sussex College, Cambridge was nominated for a 2013 Gramophone Award in recognition of their disc of the music of Thomas Weelkes. The choir also tours regularly, most recently to Germany, in December 2016, in the television show University Challenge, Sidney Sussex had a winning team in both 1971 and 1978–79. The 1978 team, comprising John Gilmore, John Adams, David Lidington, the college last appeared on the television show in 2015. It is known for producing a well-regarded May Ball for a smaller college, notably, students created an artificial lake and canal in 2010, when the ball had a Venetian theme, to enable punting at the landlocked college. Recent themes have included Light, and Beyond, as with many of the smaller colleges, Sidney Sussex does not run a May Ball every year, instead running a biennial May Ball, on even numbered years. On odd numbered years, the college hosted an Arts Festival. Notable guest speakers at the Sidney Arts Festival include Stephen Fry, however, for 2017 it was decided instead to hold a June Event
3.
Cloud chamber
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The cloud chamber, also known as the Wilson chamber, is a particle detector used for detecting ionizing radiation. In its most basic form, a chamber is a sealed environment containing a supersaturated vapor of water or alcohol. When a charged particle interacts with the mixture, the fluid is ionized, the resulting ions act as condensation nuclei, around which a mist will form. The high energies of alpha and beta particles mean that a trail is left, Cloud chambers played a prominent role in the experimental particle physics from the 1920s to the 1950s, until the advent of the bubble chamber. In particular, the discoveries of the positron in 1932, the muon in 1936, Anderson detected the positron and muon in cosmic rays. Charles Thomson Rees Wilson, a Scottish physicist, is credited with inventing the cloud chamber, inspired by sightings of the Brocken spectre while working on the summit of Ben Nevis in 1894, he began to develop expansion chambers for studying cloud formation and optical phenomena in moist air. Very rapidly he discovered that ions could act as centers for water droplet formation in such chambers and he pursued the application of this discovery and perfected the first cloud chamber in 1911. When an ionizing particle passes through the chamber, water condenses on the resulting ions. Wilson, along with Arthur Compton, received the Nobel Prize in Physics in 1927 for his work on the cloud chamber and this kind of chamber is also called a Pulsed Chamber because the conditions for operation are not continuously maintained. Further developments were made by Patrick Blackett who utilised a stiff spring to expand and compress the chamber very rapidly, a cine film was used to record the images. The diffusion cloud chamber was developed in 1936 by Alexander Langsdorf, instead of water vapor, alcohol is used because of its lower freezing point. Cloud chambers cooled by dry ice are a demonstration and hobbyist device. There are also water-cooled diffusion cloud chambers, using ethylene glycol, a simple cloud chamber consists of the sealed environment, radioactive source, dry ice or a cold plate and some kind of alcohol source. The alcohol falls as it cools down and the cold condenser provides a steep temperature gradient, the result is a supersaturated environment. The alcohol vapor condenses around ion trails left behind by the travelling ionizing particles, the result is cloud formation, seen in the cloud chamber by the presence of droplets falling down to the condenser. As particles pass through they leave ionization trails and because the vapor is supersaturated it condenses onto these trails. Since the tracks are emitted radially out from the source, their point of origin can easily be determined, just above the cold condenser plate there is an area of the chamber which is sensitive to radioactive tracks. At this height, most of the alcohol has not condensed and this means that the ion trail left by the radioactive particles provides an optimal trigger for condensation and cloud formation
4.
Fellow of the Royal Society
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As of 2016, there are around 1600 living Fellows, Foreign and Honorary Members. Fellowship of the Royal Society has been described by The Guardian newspaper as “the equivalent of a lifetime achievement Oscar” with several institutions celebrating their announcement each year. Up to 60 new Fellows, honorary and foreign members are elected annually usually in May, each candidate is considered on their merits and can be proposed from any sector of the scientific community. Fellows are elected for life on the basis of excellence in science and are entitled to use the post-nominal letters FRS, see Category, Fellows of the Royal Society and Category, Female Fellows of the Royal Society. Every year, Fellows elect up to ten new Foreign Members, like Fellows, Foreign Members are elected for life through peer review on the basis of excellence in science. As of 2016 there are around 165 Foreign Members, who are entitled to use the post-nominal ForMemRS, see Category, Foreign Members of the Royal Society. Honorary Fellows include Bill Bryson, Melvyn Bragg, Robin Saxby, David Sainsbury, Baron Sainsbury of Turville, Honorary Fellows are entitled to use the post nominal letters HonFRS. Others including John Maddox, Patrick Moore and Lisa Jardine were elected as honorary fellows, statute 12 is a legacy mechanism for electing members before official honorary membership existed in 1997. Fellows elected under statute 12 include David Attenborough and John Palmer, prime Ministers of the United Kingdom such as Margaret Thatcher, Neville Chamberlain, H. H. Asquith were elected under statute 12, see Category, Fellows of the Royal Society. The Council of the Royal Society can recommend members of the British Royal Family for election as Royal Fellows of the Royal Society. As of 2016 there are five royal fellows, Charles, Prince of Wales, Anne, Princess Royal, Prince Edward, Duke of Kent, Prince William, Duke of Cambridge and Prince Andrew, Duke of York. Her Majesty the Queen, Elizabeth II is not a Royal Fellow, Prince Philip, Duke of Edinburgh was elected under statute 12, not as a Royal Fellow. The election of new fellows is announced annually in May, after their nomination, each candidate for Fellowship or Foreign Membership is nominated by two Fellows of the Royal Society, who sign a certificate of proposal. Previously, nominations required at least five fellows to support each nomination by the proposer, the certificate of election includes a statement of the principal grounds on which the proposal is being made. There is no limit on the number of nominations each year. In 2015, there were 654 candidates for election as Fellows and 106 candidates for Foreign Membership. The final list of up to 52 Fellowship candidates and up to 10 Foreign Membership candidates is confirmed by the Council in April, a candidate is elected if he or she secures two-thirds of votes of those Fellows present and voting. A further maximum of six can be ‘Honorary’, ‘General’ or ‘Royal’ Fellows, nominations for Fellowship are peer reviewed by sectional committees, each with fifteen members and a chair
5.
J. J. Thomson
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He was elected as a fellow of the Royal Society of London and appointed to the Cavendish Professorship of Experimental Physics at the Cambridge Universitys Cavendish Laboratory in 1884. Thomson is also credited with finding the first evidence for isotopes of an element in 1913. His experiments to determine the nature of positively charged particles, with Francis William Aston, were the first use of mass spectrometry, Thomson was awarded the 1906 Nobel Prize in Physics for his work on the conduction of electricity in gases. Seven of his students, including his son George Paget Thomson and his record is comparable only to that of the German physicist Arnold Sommerfeld. Joseph John Thomson was born 18 December 1856 in Cheetham Hill, Manchester, Lancashire and his mother, Emma Swindells, came from a local textile family. His father, Joseph James Thomson, ran a bookshop founded by a great-grandfather. He had a two years younger than he was, Frederick Vernon Thomson. J. J. Thomson was a devout Anglican and his early education was in small private schools where he demonstrated outstanding talent and interest in science. In 1870 he was admitted to Owens College at the young age of 14. His parents planned to enroll him as an engineer to Sharp-Stewart & Co, a locomotive manufacturer. He moved on to Trinity College, Cambridge, in 1876, in 1880 he obtained his BA in mathematics. He applied for and became a Fellow of Trinity College in 1881, Thomson received his MA in 1883. Thomson was elected a Fellow of the Royal Society on 12 June 1884, on 22 December 1884 Thomson was chosen to become Cavendish Professor of Physics at the University of Cambridge. The appointment caused considerable surprise, given that such as Richard Glazebrook were older. Thomson was known for his work as a mathematician, where he was recognized as an exceptional talent. In 1890, Thomson married Rose Elisabeth Paget, daughter of Sir George Edward Paget, KCB and they had one son, George Paget Thomson, and one daughter, Joan Paget Thomson. He was awarded a Nobel Prize in 1906, in recognition of the merits of his theoretical and experimental investigations on the conduction of electricity by gases. He was knighted in 1908 and appointed to the Order of Merit in 1912, in 1914 he gave the Romanes Lecture in Oxford on The atomic theory
6.
Scottish people
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The Scottish people, or Scots, are a nation and ethnic group native to Scotland. Historically, they emerged from an amalgamation of the Picts and Gaels, who founded the Kingdom of Scotland in the 9th century, and are thought to have been ethnolinguistically Celts. Later, the neighbouring Cumbrian Britons, who spoke a Celtic language, as well as Germanic-speaking Anglo-Saxons. In modern usage, Scottish people or Scots is used to refer to anyone whose linguistic, cultural, the Latin word Scotti, originally the word referred specifically to the Gaels, but came to describe all inhabitants of Scotland. Considered archaic or pejorative, the term Scotch has also used for Scottish people. John Kenneth Galbraith in his book The Scotch documents the descendants of 19th-century Scottish pioneers who settled in Southwestern Ontario and he states the book was meant to give a true picture of life in the community in the early decades of the 20th century. People of Scottish descent live in countries other than Scotland. Scottish emigrants took with them their Scottish languages and culture, large populations of Scottish people settled the new-world lands of North and South America, Australia and New Zealand. Canada has the highest level of Scottish descendants per capita in the world, Scotland has seen migration and settlement of many peoples at different periods in its history. The Gaels, the Picts and the Britons have their origin myths. The Venerable Bede tells of the Scotti coming from Spain via Ireland, Germanic peoples, such as the Anglo-Saxons, arrived beginning in the 7th century, while the Norse invaded and colonized parts of Scotland from the 8th century onwards. In the High Middle Ages, from the reign of David I of Scotland, there was emigration from France, England. Some famous Scottish family names, including bearing the names which became Bruce, Balliol, Murray. Today Scotland is one of the countries of the United Kingdom, culturally, these peoples are grouped according to language. Most of Scotland until the 13th century spoke Celtic languages and these included, at least initially, the Britons, as well as the Gaels and the Picts. Germanic peoples included the Angles of Northumbria, who settled in south-eastern Scotland in the region between the Firth of Forth to the north and the River Tweed to the south. They also occupied the south-west of Scotland up to and including the Plain of Kyle and their language, south-east of the Firth of Forth, then in Lothian and the Borders, a northern variety of Old English, also known as Early Scots, was spoken. The Northern Isles and some parts of Caithness were Norn-speaking, from 1500 on, Scotland was commonly divided by language into two groups of people, Gaelic-speaking Highlanders and the Inglis-speaking Lowlanders
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Meteorology
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Meteorology is a branch of the atmospheric sciences which includes atmospheric chemistry and atmospheric physics, with a major focus on weather forecasting. The study of meteorology dates back millennia, though significant progress in meteorology did not occur until the 18th century, the 19th century saw modest progress in the field after weather observation networks were formed across broad regions. Prior attempts at prediction of weather depended on historical data, Meteorological phenomena are observable weather events that are explained by the science of meteorology. Different spatial scales are used to describe and predict weather on local, regional, Meteorology, climatology, atmospheric physics, and atmospheric chemistry are sub-disciplines of the atmospheric sciences. Meteorology and hydrology compose the interdisciplinary field of hydrometeorology, the interactions between Earths atmosphere and its oceans are part of a coupled ocean-atmosphere system. Meteorology has application in diverse fields such as the military, energy production, transport, agriculture. The word meteorology is from Greek μετέωρος metéōros lofty, high and -λογία -logia -logy, varāhamihiras classical work Brihatsamhita, written about 500 AD, provides clear evidence that a deep knowledge of atmospheric processes existed even in those times. In 350 BC, Aristotle wrote Meteorology, Aristotle is considered the founder of meteorology. One of the most impressive achievements described in the Meteorology is the description of what is now known as the hydrologic cycle and they are all called swooping bolts because they swoop down upon the Earth. Lightning is sometimes smoky, and is then called smoldering lightning, sometimes it darts quickly along, at other times, it travels in crooked lines, and is called forked lightning. When it swoops down upon some object it is called swooping lightning, the Greek scientist Theophrastus compiled a book on weather forecasting, called the Book of Signs. The work of Theophrastus remained a dominant influence in the study of weather, in 25 AD, Pomponius Mela, a geographer for the Roman Empire, formalized the climatic zone system. According to Toufic Fahd, around the 9th century, Al-Dinawari wrote the Kitab al-Nabat, ptolemy wrote on the atmospheric refraction of light in the context of astronomical observations. St. Roger Bacon was the first to calculate the size of the rainbow. He stated that a rainbow summit can not appear higher than 42 degrees above the horizon, in the late 13th century and early 14th century, Kamāl al-Dīn al-Fārisī and Theodoric of Freiberg were the first to give the correct explanations for the primary rainbow phenomenon. Theoderic went further and also explained the secondary rainbow, in 1716, Edmund Halley suggested that aurorae are caused by magnetic effluvia moving along the Earths magnetic field lines. In 1441, King Sejongs son, Prince Munjong, invented the first standardized rain gauge and these were sent throughout the Joseon Dynasty of Korea as an official tool to assess land taxes based upon a farmers potential harvest. In 1450, Leone Battista Alberti developed a swinging-plate anemometer, and was known as the first anemometer, in 1607, Galileo Galilei constructed a thermoscope
8.
Manchester
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Manchester is a major city and metropolitan borough in Greater Manchester, England, with a population of 514,414 as of 2013. It lies within the United Kingdoms second-most populous urban area, with a population of 2.55 million, Manchester is fringed by the Cheshire Plain to the south, the Pennines to the north and east and an arc of towns with which it forms a continuous conurbation. The local authority is Manchester City Council and it was historically a part of Lancashire, although areas of Cheshire south of the River Mersey were incorporated during the 20th century. Throughout the Middle Ages Manchester remained a township but began to expand at an astonishing rate around the turn of the 19th century. Manchesters unplanned urbanisation was brought on by a boom in textile manufacture during the Industrial Revolution, Manchester achieved city status in 1853. The Manchester Ship Canal opened in 1894, creating the Port of Manchester and its fortunes declined after the Second World War, owing to deindustrialisation. The city centre was devastated in a bombing in 1996, but it led to extensive investment, in 2014, the Globalization and World Cities Research Network ranked Manchester as a beta world city, the highest-ranked British city apart from London. Manchester is the third-most visited city in the UK and it is notable for its architecture, culture, musical exports, media links, scientific and engineering output, social impact, sports clubs and transport connections. Manchester Liverpool Road railway station was the worlds first inter-city passenger railway station and in the city scientists first split the atom, the name Manchester originates from the Latin name Mamucium or its variant Mancunium and the citizens are still referred to as Mancunians. These are generally thought to represent a Latinisation of an original Brittonic name, both meanings are preserved in languages derived from Common Brittonic, mam meaning breast in Irish and mother in Welsh. The suffix -chester is a survival of Old English ceaster and their territory extended across the fertile lowland of what is now Salford and Stretford. Central Manchester has been settled since this time. A stabilised fragment of foundations of the version of the Roman fort is visible in Castlefield. After the Roman withdrawal and Saxon conquest, the focus of settlement shifted to the confluence of the Irwell, much of the wider area was laid waste in the subsequent Harrying of the North. Thomas de la Warre, lord of the manor, founded and constructed a church for the parish in 1421. The church is now Manchester Cathedral, the premises of the college house Chethams School of Music. The library, which opened in 1653 and is open to the public today, is the oldest free public reference library in the United Kingdom. Manchester is mentioned as having a market in 1282, around the 14th century, Manchester received an influx of Flemish weavers, sometimes credited as the foundation of the regions textile industry
9.
Observatory
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An observatory is a location used for observing terrestrial or celestial events. Astronomy, climatology/meteorology, geology, oceanography and volcanology are examples of disciplines for which observatories have been constructed, historically, observatories were as simple as containing an astronomical sextant or Stonehenge. Astronomical observatories are mainly divided into four categories, space based, airborne, ground based, ground-based observatories, located on the surface of Earth, are used to make observations in the radio and visible light portions of the electromagnetic spectrum. Most optical telescopes are housed within a dome or similar structure, Telescope domes have a slit or other opening in the roof that can be opened during observing, and closed when the telescope is not in use. In most cases, the upper portion of the telescope dome can be rotated to allow the instrument to observe different sections of the night sky. Radio telescopes usually do not have domes, for optical telescopes, most ground-based observatories are located far from major centers of population, to avoid the effects of light pollution. The ideal locations for modern observatories are sites that have dark skies, a percentage of clear nights per year, dry air. At high elevations, the Earths atmosphere is thinner, thereby minimizing the effects of atmospheric turbulence, sites that meet the above criteria for modern observatories include the southwestern United States, Hawaii, Canary Islands, the Andes, and high mountains in Mexico such as Sierra Negra. Major optical observatories include Mauna Kea Observatory and Kitt Peak National Observatory in the USA, Roque de los Muchachos Observatory in Spain, and Paranal Observatory in Chile. Specific research study performed in 2009 shows that the best possible location for ground-based observatory on Earth is Ridge A — a place in the part of Eastern Antarctica. This location provides the least atmospheric disturbances and best visibility, beginning in 1930s, radio telescopes have been built for use in the field of radio astronomy to observe the Universe in the radio portion of the electromagnetic spectrum. Since the mid-20th century, a number of observatories have been constructed at very high altitudes, above 4. The largest and most notable of these is the Mauna Kea Observatory, the Chacaltaya Astrophysical Observatory in Bolivia, at 5,230 m, was the worlds highest permanent astronomical observatory from the time of its construction during the 1940s until 2009. It has now surpassed by the new University of Tokyo Atacama Observatory. As a result, the resolution of space telescopes such as the Hubble Space Telescope is often much smaller than a ground-based telescope with a similar aperture. However, all these advantages do come with a price, Space telescopes are much more expensive to build than ground-based telescopes. Due to their location, space telescopes are also difficult to maintain. The Hubble Space Telescope was serviced by the Space Shuttle while many other space telescopes cannot be serviced at all, Airborne observatories have the advantage of height over ground installations, putting them above most of the Earths atmosphere
10.
Ben Nevis
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Ben Nevis is the highest mountain in the British Isles, located in Scotland. Standing at 1,345 metres above sea level, it is located at the end of the Grampian Mountains in the Lochaber area of the Scottish Highlands. The mountain is a destination, attracting an estimated 100,000 ascents a year. The 700-metre cliffs of the face are among the highest in Scotland, providing classic scrambles. They are also the locations in Scotland for ice climbing. The summit, which is the dome of an ancient volcano. The meteorological data collected during this period are still important for understanding Scottish mountain weather, C. T. R. Wilson was inspired to invent the cloud chamber after a period spent working at the observatory. Ben Nevis is an Anglicisation of the Scottish Gaelic name Beinn Nibheis, Beinn is the most common Gaelic word for mountain, Nibheis is variously understood, though the word is commonly translated as malicious or venomous. An alternative interpretation is that Beinn Nibheis derives from beinn nèamh-bhathais, from nèamh heavens, clouds, one translation would therefore be the mountain with its head in the clouds, though mountain of Heaven is also frequently given. As is common for many Scottish mountains, it is both to locals and visitors as simply the Ben. Ben Nevis forms a massif with its neighbour to the northeast, Càrn Mòr Dearg, both mountains are among the nine in Scotland over 4,000 feet, Aonach Beag and Aonach Mòr are also on the Nevis massif. The hut is situated just above the confluence of Allt a Mhuilinn, in addition to the main 1, 345-metre summit, Ben Nevis has two subsidiary tops listed in Munros Tables, both of which are called Càrn Dearg. The higher of these, at 1,221 metres, is situated to the northwest, the other Càrn Dearg juts out into Glen Nevis on the mountains southwestern side. A lower hill, Meall an t-Suidhe, is located further west, forming a saddle with Ben Nevis which contains a small loch, the popular tourist path from Glen Nevis skirts the side of this hill before ascending Ben Neviss broad western flank. Ben Nevis is all that remains of a Devonian volcano that met an end in the Carboniferous period around 350 million years ago. Evidence near the summit shows light-coloured granite lies among dark basaltic lavas, the two lying side-by-side is evidence the huge volcano collapsed in on itself creating an explosion comparable to Thera or Krakatoa. The mountain is now all that remains of the inner dome of the volcano. Its form has been shaped by glaciation
11.
Glory (optical phenomenon)
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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, the cause of the glory remains a matter of scholarly debate. Depending on circumstances, one or more of the rings can be visible. The angular size of the inner and brightest ring is smaller than that of a rainbow, about 5° to 20°. In the right conditions, a glory and a rainbow can occur simultaneously, like a rainbow, a glory is centered on the antisolar point, which coincides with the shadow of the observers head. Since this point is by definition diametrically opposed to the Suns position in the sky, in order to see a glory, therefore, the clouds or fog causing it must be located below the observer, in a straight line with the Sun/Moon and the observers eye. Hence, the glory is commonly observed from a high viewpoint such as a mountain, in the latter case, if the plane is flying sufficiently low for its shadow to be visible on the clouds, the glory always surrounds it. This is sometimes called The Glory of the Pilot, the name derives from the Brocken, the tallest peak of the Harz mountain range in Germany. Because the peak is above the level and the area frequently misty. In Goethes Faust, the Brocken is called the Blocksberg and is the site of the Witches Sabbath on Walpurgis Night, the scientific explanation is still the subject of debates and research. In 1947, the Dutch astronomer Hendrik van de Hulst suggested that waves are involved. C. T. R. Wilson saw a glory while working as an observer at the Ben Nevis weather station. Inspired by the sight, he decided to build a device for creating clouds in the laboratory, so that he could make a synthetic. His work led directly to the chamber, a device for detecting ionizing radiation for which he. In China, the phenomenon is called Buddhas light and it is often observed on cloud-shrouded high mountains, such as Huangshan and Mount Emei. Records of the phenomenon at Mount Emei date back to A. D.63, the colorful halo always surrounds the observers own shadow, and thus was often taken to show the observers personal enlightenment. The same phenomenon dupes the highly pious heir apparent of the Polish duchy into strongly supporting the new model armys pragmatic departures from the days chivalristic practices and this atmospheric effect also makes at least one appearance in Gothic fiction. George sees shimmering colored light in front of him, then he sees the shadow of an enormous dark figure advancing toward him threateningly—the Brocken spectre created by the shadow of Robert sneaking up behind him
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X-ray
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X-radiation is a form of electromagnetic radiation. Most X-rays have a wavelength ranging from 0.01 to 10 nanometers, corresponding to frequencies in the range 30 petahertz to 30 exahertz, X-ray wavelengths are shorter than those of UV rays and typically longer than those of gamma rays. Spelling of X-ray in the English language includes the variants x-ray, xray, X-rays with high photon energies are called hard X-rays, while those with lower energy are called soft X-rays. Due to their ability, hard X-rays are widely used to image the inside of objects, e. g. in medical radiography. The term X-ray is metonymically used to refer to an image produced using this method. Since the wavelengths of hard X-rays are similar to the size of atoms they are useful for determining crystal structures by X-ray crystallography. By contrast, soft X-rays are easily absorbed in air, the length of 600 eV X-rays in water is less than 1 micrometer. There is no consensus for a definition distinguishing between X-rays and gamma rays, one common practice is to distinguish between the two types of radiation based on their source, X-rays are emitted by electrons, while gamma rays are emitted by the atomic nucleus. This definition has problems, other processes also can generate these high-energy photons. One common alternative is to distinguish X- and gamma radiation on the basis of wavelength, with radiation shorter than some arbitrary wavelength, such as 10−11 m and this criterion assigns a photon to an unambiguous category, but is only possible if wavelength is known. Occasionally, one term or the other is used in specific contexts due to precedent, based on measurement technique. Thus, gamma-rays generated for medical and industrial uses, for radiotherapy, in the ranges of 6–20 MeV. X-ray photons carry enough energy to ionize atoms and disrupt molecular bonds and this makes it a type of ionizing radiation, and therefore harmful to living tissue. A very high radiation dose over a period of time causes radiation sickness. In medical imaging this increased risk is generally greatly outweighed by the benefits of the examination. The ionizing capability of X-rays can be utilized in treatment to kill malignant cells using radiation therapy. It is also used for material characterization using X-ray spectroscopy, hard X-rays can traverse relatively thick objects without being much absorbed or scattered. For this reason, X-rays are widely used to image the inside of visually opaque objects, the most often seen applications are in medical radiography and airport security scanners, but similar techniques are also important in industry and research
