luminance temperature
121Color photography — Color film redirects here. For the motion picture equivalent, see Color motion picture film. A circa 1850 Hillotype photograph of a colored engraving. Long believed to be a complete fraud, recent testing found that Levi Hill s process did… …
122Blue Phase Mode LCD — History= In Reinitzer s reports from 1888 on the melting behaviour of cholesteryl benzoate there is a note that the substance briefly turned blue as it changed from clear to cloudy upon cooling. This subtle effect however remained unexplored for… …
123Superradiance — Compétition des modes La superradiance est une émission de rayons lumineux ayant une radiance (= luminance) absolue très supérieure au minimum moyen hν3 / c2 donné par Planck ( M. Planck , Eine neue Strahlungshypothese, Verh. Deutsch. Phys. Ges.… …
124MICROSCOPIE — La révolution qui consiste, à la fin du XVIe siècle, à regarder «à la loupe» non plus directement un objet, mais son image agrandie est à l’origine de la microscopie. L’étymologie (du grec mikros , petit, et skopein , examiner) renvoie à l’examen …
125TURBULENCE — Le mot turbulence fait songer à agitation, désordre, chaos. L’évolution spatiale ou temporelle de nombreux phénomènes est caractérisée par l’absence apparente d’ordre, la coexistence d’échelles très différentes, l’impossibilité d’une reproduction …
126Color space — A comparison of the chromaticities enclosed by some color spaces. A color model is an abstract mathematical model describing the way colors can be represented as tuples of numbers, typically as three or four values or color components (e.g. RGB… …
127Visual display unit — A visual display unit, often called simply a monitor or display, is a piece of electrical equipment which displays images generated from the video output of devices such as computers, without producing a permanent record. A newer monitor… …
128Luminosity — has different meanings in several different fields of science.In photometry and color imagingIn photometry, luminosity is sometimes incorrectly used to refer to luminance, which is the density of luminous intensity in a given direction. The SI… …
