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White light | A Wisdom Archive on White light | | White light A selection of articles related to White light | |
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Isaiah
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| ARTICLES RELATED TO White light | | | |  White light: Encyclopedia II - Bicycle lighting - Front lighting
Bicycle lighting - LEDs.
Cyclists that ride at night only occasionally might opt for an inexpensive LED front light and rear LED flasher. Red or yellow LEDs suitable for use as rear lights have been available for many years. Recently, white LEDs which satisfy the requirements for a front light have come on the market, and some jurisdictions have or are considering making these legally acceptable. Very high-power LEDs are sensitive to overheating (e.g. 5W Luxeon Vs), and over-driving, if the enclosure, and driving ...
See also:Bicycle lighting, Bicycle lighting - History, Bicycle lighting - Choosing an Appropriate Lighting System, Bicycle lighting - Legal requirements, Bicycle lighting - Safety, Bicycle lighting - Front lighting, Bicycle lighting - LEDs, Bicycle lighting - Low-cost battery lights, Bicycle lighting - Rechargeable Flashlights, Bicycle lighting - Rechargeable Halogen Systems, Bicycle lighting - Rechargeable H.I.D. Systems, Bicycle lighting - Dynamo Systems, Bicycle lighting - Rear lighting, Bicycle lighting - Filament lamps, Bicycle lighting - LEDs, Bicycle lighting - Xenon strobes, Bicycle lighting - Supplementary lighting and conspicuity, Bicycle lighting - Headtorches, Bicycle lighting - Reflective and high-visibility materials, Bicycle lighting - Repairs in the Dark, Bicycle lighting - Measures of light output, Bicycle lighting - Watts, Bicycle lighting - Candela, Bicycle lighting - Lumens, Bicycle lighting - Conclusion Read more here: » Bicycle lighting: Encyclopedia II - Bicycle lighting - Front lighting |
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| | | | | | White light: Encyclopedia II - Isaac Newton's early life and achievements - Newton's poverty On March 8, 1673 Newton wrote to Oldenburg, the secretary of the Royal Society:
"Sir, I desire that you will procure that I may be put out from being any longer Fellow of the Royal Society: for though I honour that body, yet since I see I shall neither profit them, nor (by reason of this distance) can partake of the advantage of their assemblies, I desire to withdraw."
Oldenburg must have replied to this by an offer to apply to the Society to excuse Newton the weekly payments, as in a letter of Newton's to Oldenburg, dated June ...
See also:Isaac Newton's early life and achievements, Isaac Newton's early life and achievements - Birth and education, Isaac Newton's early life and achievements - Academic career, Isaac Newton's early life and achievements - The composition of white light, Isaac Newton's early life and achievements - Newton's theory of colour, Isaac Newton's early life and achievements - Controversies, Isaac Newton's early life and achievements - Conflict over oratorship elections, Isaac Newton's early life and achievements - Newton's poverty, Isaac Newton's early life and achievements - Universal law of gravitation Read more here: » Isaac Newton's early life and achievements: Encyclopedia II - Isaac Newton's early life and achievements - Newton's poverty |
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| | | | | White light: Encyclopedia II - Isaac Newton's early life and achievements - Academic career In January 1665 Newton took the degree of B.A.. The persons appointed (in conjunction with the proctors, John Slade of Catharine Hall, Cambridge, and Benjamin Pulleyn of Trinity College, Newton's tutor) to examine the questionists were John Eachard of Catharine Hall and Thomas Gipps of Trinity College. It is a curious accident that we have no information about the respective merits of the candidates for a degree in this year, since the "ordo senio ...
See also:Isaac Newton's early life and achievements, Isaac Newton's early life and achievements - Birth and education, Isaac Newton's early life and achievements - Academic career, Isaac Newton's early life and achievements - The composition of white light, Isaac Newton's early life and achievements - Newton's theory of colour, Isaac Newton's early life and achievements - Controversies, Isaac Newton's early life and achievements - Conflict over oratorship elections, Isaac Newton's early life and achievements - Newton's poverty, Isaac Newton's early life and achievements - Universal law of gravitation Read more here: » Isaac Newton's early life and achievements: Encyclopedia II - Isaac Newton's early life and achievements - Academic career |
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| | | | | White light: Encyclopedia II - Solid State Lighting - Technology Overview A single LED can produce only a limited amount of light, and only a single color at a time. To produce the white light necessary for SSL, light spanning the visible spectrum (red, green, and blue) must be generated in correct proportions. To achieve this effect, three approaches are used for generating white light with LEDs: wavelength conversion, color mixing, and most recently Homoepitaxial ZnSe.
Wavelength conversion involves converting some or all of the LED’s output into visible wavelengths. Methods ...
See also:Solid State Lighting, Solid State Lighting - History, Solid State Lighting - Technology Overview, Solid State Lighting - Advantages of SSL, Solid State Lighting - Technological Comparison, Solid State Lighting - Benefits, Solid State Lighting - Challenges, Solid State Lighting - Technological Hurdles, Solid State Lighting - Adaptation Hurdles, Solid State Lighting - Research and Development, Solid State Lighting - Future Read more here: » Solid State Lighting: Encyclopedia II - Solid State Lighting - Technology Overview |
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| | | | | White light: Encyclopedia II - Runway - Runway Lighting At bigger airports, runways use a standard lighting system to allow night landings. Seen from a landing plane, the runway starts with a strip of green lights at the near end and stops with a strip of red lights at the far end. The runway itself is framed with white elevated edge lights, as opposed to the blue elevated edge lights of a taxiway. The centerline is often indicated by white lights, which may be coded alternately white and yellow and then purely yellow nearing the far end of the runway. Furthermore, many runways equipped with inst ...
See also:Runway, Runway - Description, Runway - Runway Lighting, Runway - Runway markings, Runway - Active runway, Runway - Longest runways Read more here: » Runway: Encyclopedia II - Runway - Runway Lighting |
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| | | | | White light: Encyclopedia II - Isaac Newton's early life and achievements - Birth and education Sir Isaac Newton (January 4, 1643 - March 31, 1727 Gregorian Calendar), the English mathematician and scientist, was born at Woolsthorpe-by-Colsterworth, a hamlet in the parish of Colsterworth, Lincolnshire, about 6 miles from Grantham. His father (also named Isaac Newton) who farmed a small freehold property, died before his son's birth, a few months after his marriage to Hannah Ayscough, a daughter of James Ayscough of Market-Overton. When Newton was two years old his mother married Barnabas Smith, rector of North Witham. Of this marriage there was issue, Benjamin, Mary and Hannah Smi ...
See also:Isaac Newton's early life and achievements, Isaac Newton's early life and achievements - Birth and education, Isaac Newton's early life and achievements - Academic career, Isaac Newton's early life and achievements - The composition of white light, Isaac Newton's early life and achievements - Newton's theory of colour, Isaac Newton's early life and achievements - Controversies, Isaac Newton's early life and achievements - Conflict over oratorship elections, Isaac Newton's early life and achievements - Newton's poverty, Isaac Newton's early life and achievements - Universal law of gravitation Read more here: » Isaac Newton's early life and achievements: Encyclopedia II - Isaac Newton's early life and achievements - Birth and education |
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| | | | | White light: Encyclopedia II - Runway - Runway Lighting At bigger airports, runways use a standard lighting system to allow night landings. Seen from a landing plane, the runway starts with a strip of green lights at the near end and stops with a strip of red lights at the far end. The runway itself is framed with white elevated edge lights, as opposed to the blue elevated edge lights of a taxiway. The centerline is often indicated by white lights, which may be coded alternately white and yellow and then purely yellow nearing the far end of the runway. Furthermore, many runways equipped with inst ...
See also:Runway, Runway - Orientation and dimensions, Runway - Runway Lighting, Runway - Runway markings, Runway - Active runway, Runway - Longest runways Read more here: » Runway: Encyclopedia II - Runway - Runway Lighting |
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| | | | | | White light: Encyclopedia II - English Channel - Formation of the Channel Before the end of the last ice age, around 10,000 years ago, the British Isles were part of mainland Europe. As the icesheet melted, a large freshwater lake formed in the southern part of what is now the North Sea. The outflow channel from the lake entered the Atlantic Ocean in the region of Dover and Calais.
At some point around 6500 BC, catastrophic erosion swept away the chalk to create the English Channel, which has since been further widened by wave action on the soft, chalk cliffs. The ...
See also:English Channel, English Channel - Formation of the Channel, English Channel - Historical significance, English Channel - The Channel Tunnel, English Channel - Notable Channel crossings Read more here: » English Channel: Encyclopedia II - English Channel - Formation of the Channel |
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| | | | | | White light: Encyclopedia II - Rhodesia - Politics Main Article: Politics of Rhodesia
The 1961 Constitution governed Rhodesia up till 1969. It used the Westminster Parliamentary System, though with separate voter rolls for Whites and Blacks (Whites had the majority of Seats).
Under the 1969 (Republic) constitution, there was a bicameral parliament consisting of an indirectly elected senate and a directly elected House of Assembly, in which the majority of seats were once again reserved for whites. The office of president was a ceremonial post, with executive pow ...
See also:Rhodesia, Rhodesia - History, Rhodesia - 1953–1965, Rhodesia - UDI, Rhodesia - The Bush War or Second Chimurenga, Rhodesia - End game, Rhodesia - Independence, Rhodesia - Politics, Rhodesia - Publications, Rhodesia - African perspective, Rhodesia - Settler perspective, Rhodesia - White government perspective, Rhodesia - Land, Rhodesia - Other Read more here: » Rhodesia: Encyclopedia II - Rhodesia - Politics |
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| | | | | White light: Encyclopedia II - Brown dwarf - History Brown dwarfs were originally called black dwarfs, a classification for dark substellar objects floating freely in space which were too low in mass to sustain stable hydrogen fusion (black dwarfs currently refer to something different).
Early stellar models suggested that a true star requires a mass at least 80 times that of Jupiter to support such fusion. Dense star-like objects with smaller masses, or "brown dwarfs," were hypothesized by the early 1960s -- formed much the way stars are formed, they would however be hard to fin ...
See also:Brown dwarf, Brown dwarf - History, Brown dwarf - In theory, Brown dwarf - Distinguishing heavy brown dwarfs from light stars, Brown dwarf - Distinguishing light brown dwarfs from large planets, Brown dwarf - In practice, Brown dwarf - Observational techniques, Brown dwarf - Milestones, Brown dwarf - Recent developments Read more here: » Brown dwarf: Encyclopedia II - Brown dwarf - History |
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| | | | | | White light: Encyclopedia II - Brown dwarf - In theory
Brown dwarf - Distinguishing heavy brown dwarfs from light stars.
Lithium: Lithium is generally present in brown dwarfs and not in low-mass stars. Stars, which achieve the high temperature necessary for fusing hydrogen, rapidly deplete their lithium. This occurs by a collision of Lithium-7 and a proton producing two Helium-4 nuclei. The temperature necessary for this reaction is just below the temperature necessary for hydrogen fusion. Convection in stars ensures that lithium in the whole volume of the sta ...
See also:Brown dwarf, Brown dwarf - History, Brown dwarf - In theory, Brown dwarf - Distinguishing heavy brown dwarfs from light stars, Brown dwarf - Distinguishing light brown dwarfs from large planets, Brown dwarf - In practice, Brown dwarf - Observational techniques, Brown dwarf - Milestones, Brown dwarf - Recent developments Read more here: » Brown dwarf: Encyclopedia II - Brown dwarf - In theory |
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| | | | | White light: Encyclopedia II - Christmas lights - History The first known electrically-illuminated Christmas tree was the creation of Edward H. Johnson, an associate of inventor Thomas Edison. While he was vice president of the Edison Electric Light Company, a predecessor of today's Con Edison electric utility, he had Christmas tree light bulbs especially made for him. He proudly displayed his Christmas tree, which was hand-wired with 80 red, white and blue electric incandescent light bulbs the size of walnuts, on December 22, 1882 at his home on Fifth Avenue in New York City. Local newpapers ignor ...
See also:Christmas lights, Christmas lights - History, Christmas lights - Types, Christmas lights - Safety, Christmas lights - House lights, Christmas lights - Trivia Read more here: » Christmas lights: Encyclopedia II - Christmas lights - History |
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| | | | | White light: Encyclopedia II - Christmas lights - History The first known electrically-illuminated Christmas tree was the creation of Edward H. Johnson, an associate of inventor Thomas Edison. While he was vice president of the Edison Electric Light Company, a predecessor of today's Con Edison electric utility, he had Christmas tree light bulbs especially made for him. He proudly displayed his Christmas tree, which was hand-wired with 80 red, white and blue electric incandescent light bulbs the size of walnuts, on December 22, 1882 at his home on Fifth Avenue in New York City. Local newspapers igno ...
See also:Christmas lights, Christmas lights - History, Christmas lights - Types, Christmas lights - Safety, Christmas lights - House lights, Christmas lights - Trivia Read more here: » Christmas lights: Encyclopedia II - Christmas lights - History |
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| | | | | White light: Encyclopedia II - Brown dwarf - In practice Typical atmospheres of known brown dwarfs range in temperature from 300 to over 3000 K, in comparison with stars, which cool to minimum temperatures of around 4000 K. Compared to stars, which warm themselves with steady internal fusion, brown dwarfs cool quickly over time; more massive dwarfs cool slower than less massive ones.
Brown dwarf - Observational techniques.
Coronographs have recently been used to detect faint objects orbiting bright visible stars, including Gliese 229B.
Sensitive ...
See also:Brown dwarf, Brown dwarf - History, Brown dwarf - In theory, Brown dwarf - Distinguishing heavy brown dwarfs from light stars, Brown dwarf - Distinguishing light brown dwarfs from large planets, Brown dwarf - In practice, Brown dwarf - Observational techniques, Brown dwarf - Milestones, Brown dwarf - Recent developments Read more here: » Brown dwarf: Encyclopedia II - Brown dwarf - In practice |
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| | | | | White light: Encyclopedia II - Rhodesia - End game The need to cut a deal was apparent to most Rhodesians by 1978 – but not to all. Rhodesian special forces carried out a raid on Joshua Nkomo's residence in Lusaka (Zambia) with the stated intention of assassinating him. This was curious, given that the Rhodesian government was secretly negotiating with Nkomo over a deal to keep Mugabe out of power. Nkomo, tipped off by the Rhodesian intelligence servi ...
See also:Rhodesia, Rhodesia - History, Rhodesia - 1953–1965, Rhodesia - UDI, Rhodesia - The Bush War or Second Chimurenga, Rhodesia - End game, Rhodesia - Independence, Rhodesia - Politics, Rhodesia - Publications, Rhodesia - African perspective, Rhodesia - Settler perspective, Rhodesia - White government perspective, Rhodesia - Land, Rhodesia - Other Read more here: » Rhodesia: Encyclopedia II - Rhodesia - End game |
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| | | | | White light: Encyclopedia II - White blood cell - Types There are three major types of white blood cells.
White blood cell - Granulocytes.
Granulocytes are a category of white blood cells, characterised by the fact that all types have differently staining granules in their cytoplasm on light microscopy. There are three types of granulocytes: neutrophils, basophils, and eosinophils (named according to their staining properties).
...
See also:White blood cell, White blood cell - Nomenclature, White blood cell - Types, White blood cell - Granulocytes, White blood cell - Lymphocytes, White blood cell - Monocytes, White blood cell - Diseases, White blood cell - Other tissue cells Read more here: » White blood cell: Encyclopedia II - White blood cell - Types |
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| | | | | White light: Encyclopedia II - Rhodesia - History
Rhodesia - 1953–1965.
In 1953, with calls for independence mounting in many of its African possessions, the United Kingdom created the Federation of Rhodesia and Nyasaland (or the Central African Federation), which consisted of Southern Rhodesia, Northern Rhodesia and Nyasaland (now Zimbabwe, Zambia, and Malawi, respectively). The idea was to try and steer a middle road between the aspirations of the Black Nationalists (who were Marxist in their politics) and the Colonial administrations, which represented the ...
See also:Rhodesia, Rhodesia - History, Rhodesia - 1953–1965, Rhodesia - UDI, Rhodesia - The Bush War or Second Chimurenga, Rhodesia - End game, Rhodesia - Independence, Rhodesia - Politics, Rhodesia - Publications, Rhodesia - African perspective, Rhodesia - Settler perspective, Rhodesia - White government perspective, Rhodesia - Land, Rhodesia - Other Read more here: » Rhodesia: Encyclopedia II - Rhodesia - History |
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| | | | | White light: Encyclopedia II - Rhodesia - Publications
Rhodesia - African perspective.
Ranger, Terence O. The African voice in Southern Rhodesia, 1898-1930 (Northwestern Univ. Press, 1970) ISBN 0810103206
Parker, Franklin. African development and education in Southern Rhodesia (Greenwood Press, Westport, Conn., 1970) ISBN 0034329839
Hone, Percy Frederick. Southern Rhodesia (Negro Universities Press, 1969) ISBN 0837126614
"Race Relations in Rhodesia, Survey for 1972-73" by D.K.Davies, London, 1975, ISBN 901720569
Boggie, Jeannie M.Experiences of Rhodesia's Pioneer Women (Bulawayo, 1s ...
See also:Rhodesia, Rhodesia - History, Rhodesia - 1953–1965, Rhodesia - UDI, Rhodesia - The Bush War or Second Chimurenga, Rhodesia - End game, Rhodesia - Independence, Rhodesia - Politics, Rhodesia - Publications, Rhodesia - African perspective, Rhodesia - Settler perspective, Rhodesia - White government perspective, Rhodesia - Land, Rhodesia - Other Read more here: » Rhodesia: Encyclopedia II - Rhodesia - Publications |
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