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ROYGBIV
ROYGBIV is an acronym for the sequence of hues commonly described as making up a rainbow: red, orange, yellow, green, blue, indigo, and violet. There are several mnemonics that can be used for remembering this color sequence, such as the name "Roy G. Biv" or sentences such as " Richard of York Gave Battle in Vain". The battle is the Battle of Wakefield in 1460 which killed him. History In the Renaissance, several artists tried to establish a sequence of up to seven primary colors from which all other colors could be mixed. In line with this artistic tradition, Sir Isaac Newton divided his color circle, which he constructed to explain additive color mixing, into seven colors. Originally he used only five colors, but later he added orange and indigo to match the number of musical notes in the major scale. The Munsell color system, the first formal color notation system (1905), names only five "principal hues": red, yellow, green, blue, and purple. Mnemonics Isaac New ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Mnemonics
A mnemonic device ( ), memory trick or memory device is any learning technique that aids information retention or retrieval in the human memory, often by associating the information with something that is easier to remember. It makes use of elaborative encoding, retrieval cues and imagery as specific tools to encode information in a way that allows for efficient storage and retrieval. It aids original information in becoming associated with something more accessible or meaningful—which in turn provides better retention of the information. Commonly encountered mnemonics are often used for lists and in auditory form such as short poems, acronyms, initialisms or memorable phrases. They can also be used for other types of information and in visual or kinesthetic forms. Their use is based on the observation that the human mind more easily remembers spatial, personal, surprising, physical, sexual, humorous and otherwise "relatable" information rather than more abstract or imper ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Rainbow
A rainbow is an optical phenomenon caused by refraction, internal reflection and dispersion of light in water droplets resulting in a continuous spectrum of light appearing in the sky. The rainbow takes the form of a multicoloured circular arc. Rainbows caused by sunlight always appear in the section of sky directly opposite the Sun. Rainbows can be caused by many forms of airborne water. These include not only rain, but also mist, spray, and airborne dew. Rainbows can be full circles. However, the observer normally sees only an arc formed by illuminated droplets above the ground, and centered on a line from the Sun to the observer's eye. In a primary rainbow, the arc shows red on the outer part and violet on the inner side. This rainbow is caused by light being refracted when entering a droplet of water, then reflected inside on the back of the droplet and refracted again when leaving it. In a double rainbow, a second arc is seen outside the primary arc, and has the or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Richard Of York, 3rd Duke Of York
Richard of York, 3rd Duke of York (21 September 1411 – 30 December 1460), also named Richard Plantagenet, was a leading English magnate and claimant to the throne during the Wars of the Roses. He was a member of the ruling House of Plantagenet by virtue of being a direct male-line descendant of Edmund of Langley, King Edward III's fourth surviving son. However, it was through his mother, Anne Mortimer, a descendant of Edward III's second surviving son, Lionel of Antwerp, that Richard inherited his strongest claim to the throne, as the opposing House of Lancaster was descended from John of Gaunt, Duke of Lancaster, the third surviving son of Edward III. He also inherited vast estates and served in various offices of state in Ireland, France and England, a country he ultimately governed as Lord Protector due to the mental instability of King Henry VI. Richard's conflicts with Henry's wife, Margaret of Anjou, and other members of Henry's court, such as Edmund Beaufort, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Battle Of Wakefield
The Battle of Wakefield took place in Sandal Magna near Wakefield in northern England, on 30 December 1460. It was a major battle of the Wars of the Roses. The opposing forces were an army led by nobles loyal to the captive King Henry VI of the House of Lancaster and his Queen Margaret of Anjou on one side, and the army of Richard, Duke of York, the rival claimant to the throne, on the other. For several years before the battle, the Duke of York had become increasingly opposed to the weak King Henry's court. After open warfare broke out between the factions and Henry became his prisoner, he laid claim to the throne, but lacked sufficient support. Instead, in an agreement known as the Act of Accord, he was made Henry's heir to the throne, displacing from the succession Henry's and Margaret's 7-year-old son Edward, Prince of Wales. Margaret of Anjou and several prominent nobles were irreconcilably opposed to this accord, and massed their armies in the north. Richard of York ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Munsell Color System
The Munsell color system is a color space that specifies colors based on three properties of color: hue (basic color), value (lightness), and colorfulness, chroma (color intensity). It was created by Albert Henry Munsell, Albert H. Munsell in the first decade of the 20th century and adopted by the United States Department of Agriculture (USDA) as the official color system for soil research in the 1930s. Several earlier color order systems in the field of colorimetry had placed colors into a three-dimensional color solid of one form or another, but Munsell was the first to separate hue, value, and chroma into Color difference#Tolerance, perceptually uniform and independent dimensions, and he was the first to illustrate the colors systematically in three-dimensional space. Munsell's system, particularly the later renotations, is based on rigorous measurements of human subjects' color vision, visual responses to color, putting it on a firm experimental scientific basis. Because of th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Optical Spectrum
The visible spectrum is the band of the electromagnetic spectrum that is visible to the human eye. Electromagnetic radiation in this range of wavelengths is called ''visible light'' (or simply light). The optical spectrum is sometimes considered to be the same as the visible spectrum, but some authors define the term more broadly, to include the ultraviolet and infrared parts of the electromagnetic spectrum as well, known collectively as '' optical radiation''. A typical human eye will respond to wavelengths from about 380 to about 750 nanometers. In terms of frequency, this corresponds to a band in the vicinity of 400–790 terahertz. These boundaries are not sharply defined and may vary per individual. Under optimal conditions, these limits of human perception can extend to 310 nm (ultraviolet) and 1100 nm (near infrared). The spectrum does not contain all the colors that the human visual system can distinguish. '' Unsaturated colors'' such as pink, or purpl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Boards Of Canada
Boards of Canada are a Scottish electronic music duo consisting of the brothers Mike Sandison and Marcus Eoin. Signing first to Skam Records, Skam followed by Warp (record label), Warp Records in the 1990s, they received recognition following the release of their debut album, ''Music Has the Right to Children,'' on Warp in 1998. They followed with the acclaimed albums ''Geogaddi'' (2002), ''The Campfire Headphase'' (2005) and ''Tomorrow's Harvest'' (2013). The duo's work, largely influenced by media and electronic music from the 1970s, incorporates vintage synthesiser tones, Sample (music), samples, Analog recording, analog equipment, and hip hop-inspired beats. It has been described by critics as exploring themes related to nostalgia, as well as childhood memory, science, environmental concerns and esoteric subjects. In 2012, ''Fact (UK magazine), Fact'' described them as "one of the best-known and best-loved electronic acts of the last two decades". History Early years (1986†... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Roygbiv (song)
''Music Has the Right to Children'' is the debut studio album by Scottish electronic music duo Boards of Canada, released on 20 April 1998 in the United Kingdom by Warp and Skam Records and in the United States by Matador. The album was produced at Hexagon Sun, the duo's personal recording studio in Pentland Hills, and continued their distinctive style of electronica, featuring vintage synthesisers, degraded analogue production, found sounds and samples, and hip hop-inspired rhythms that had been featured on their first two EPs ''Twoism'' (1995) and '' Hi Scores'' (1996). The album received widespread acclaim upon its release, and has since been acknowledged as a landmark work in electronic music, going on to inspire a variety of subsequent artists. It has been included on various best-ever lists by publications such as ''Pitchfork'' and ''Mojo''. Background The members of Boards of Canada, brothers Michael Sandison and Marcus Eoin, had been creating music together as earl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Artemis Fowl
''The Fowl Adventures'' is a series of eleven fantasy novels written by Irish author Eoin Colfer revolving around various members of the Fowl family. The first cycle, the eight-book ''Artemis Fowl'', follows elf Lower Elements Police Reconnaissance (LEPRecon) officer Holly Short as she faces the forces of criminal mastermind Artemis Fowl II; later on in the cycle the adversaries are forced to work together, gradually becoming firm friends/brief love interests while saving the world. The second cycle, the three-book ''The Fowl Twins'', received commercial success and positive critical reception. It has also originated graphic novel adaptations. In 2010, ''Artemis Fowl'' was selected by readers and voters as their favorite Puffin Books title of all time. A film adaptation based on the first novel was in the process of development by Disney from 2016, and eventually released on the Disney+ streaming service on June 12, 2020 to negative reviews, before being removed from the ser ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Artemis Fowl And The Eternity Code
''Artemis Fowl and the Eternity Code'' (known in America as ''Artemis Fowl: The Eternity Code'') is the third book of Irish children's fiction author Eoin Colfer's ''Artemis Fowl'' series. It is preceded by '' Artemis Fowl and the Arctic Incident'' and followed by '' Artemis Fowl and the Opal Deception''. The storyline follows Artemis Fowl and his companions as they struggle to recover the " C Cube", a supercomputer Artemis had constructed from fairy technology, when Jon Spiro manages to steal it. Critical response was generally favourable. Plot Artemis Fowl II, the 13-year-old criminal mastermind, has created a supercomputer which he calls the "C Cube", from the stolen fairy LEPrecon helmets confiscated by Butler in the siege of Fowl Manor. It far surpasses any human technology made so far. Fowl meets Chicago businessman Jon Spiro in London to show him the Cube, in an attempt to buy a considerable amount of gold in exchange for keeping the technology off the market. Howev ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
