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In the simplest case, the yellow flame is luminous due to small soot particles in the flame which are heated to incandescence. Producing a deliberately luminous flame requires either a shortage of combustion air (as in a Bunsen burner) or a local excess of fuel (as for a kerosene torch).
Candoluminescence is the light given off by certain materials at elevated temperatures (usually when exposed to a flame) that has an intensity at some wavelengths which can, through chemical action in flames, be higher than the blackbody emission expected from incandescence at the same temperature. [1]
As the definition does not fully describe the phenomenon, quantum mechanics is employed where it is defined as there is no change in spin multiplicity from the state of excitation to emission of light. [2] Phosphorescence, traditionally defined as persistent emission of light after the end of excitation. As the definition does not fully ...
Tricolon – the pattern of three phrases in parallel, found commonly in Western writing after Cicero—for example, the kitten had white fur, blue eyes, and a pink tongue. Trivium – grammar, rhetoric, and logic taught in schools during the medieval period. Tropes – a figure of speech that uses a word aside from its literal meaning.
For example, the phrase, "John, my best friend" uses the scheme known as apposition. Tropes (from Greek trepein, 'to turn') change the general meaning of words. An example of a trope is irony, which is the use of words to convey the opposite of their usual meaning ("For Brutus is an honorable man; / So are they all, all honorable men").
The inverse gambler's fallacy, named by philosopher Ian Hacking, is a formal fallacy of Bayesian inference which is an inverse of the better known gambler's fallacy.It is the fallacy of concluding, on the basis of an unlikely outcome of a random process, that the process is likely to have occurred many times before.
Vannevar Bush's 1945 report, Science: The Endless Frontier, made the argument for the value of basic research in the postwar era, and was the basis for many appeals to the federal funding of basic research. [6] The 1957 launch of Sputnik prompted the United States Air Force Office of Scientific Research to sponsor blue skies research into the ...
Pyrognomic materials are said to become visibly incandescent at relatively low temperatures.In practice, virtually all solid or liquid substances start to visibly incandesce around 798 K (525 °C; 977 °F), with a mildly dull red color, whether or not a chemical reaction takes place that produces light as a result of an exothermic process.