Všude kolem nás je přítomno reliktní záření, světlo z období konce velkého třesku, které v sobě nese cenné informace o raném vesmíru a o prostředí, kterým k nám procházelo. Při poznávání vesmíru získáváme většinu informací o vzdálených objektech prostředníctvím elektromagnetického záření nejrůznějších vlnových délek. V mikrovlném oboru sledují dnešní specializované sondy nejen nejchladnější zákoutí vesmíru, ale i světlo dávných časů, které se vydalo na svou pouť v období, kdy se ve vesmíru formovaly první atomy., Cosmic microwave background radiation exists all around us. It is the light from the end of the Big Bang, which carries valuable information about the early universe and the environment, throught which it has passed. Most of the Information about distant objects we obtain through electromagnetic radiation at various wavelengths. In the microwave band today‘s specialised probes watch not only the coldest corners of the universe, but also the light from ancient times, which started its journey during the period when electron shells in atoms formed in the universe., Petr Kulhánek., and Obsahuje seznam literatury
Let us look at light used in art from the perspective of art history. Light is important in the methods used for displaying reality and the formation of different styles in painting. During the middle ages painters sought not only to display the real behaviour of light in the world but used light to view transcendental elements. Magister Theodoricus for example seemingly placed the light source inside the volume of figures of saints, and thus strengthened their spiritual presence in the area of the chapel in Karlštejn castle. The master of the Wittingau altar used a shadow to amplify the mystery of the scene, like the Dutch masters from the early 15th century in their night scenes. By using sfumato, Leonardo forced the viewer to start actively looking at indistinct contours of his characters and thus intensified their vividness. Caravaggio from before 1600 put emphasis on the contrasts of light and darkness, thus his chiaroscuro figures sharply emenate into light. The light carves objects out of the surrounding darkness and facilitates composing images. During this time, Galileo through his telescope and his art of drawing identified "spots" of the Moon as craters. Simultaneously, Annibale Carracci, and before him Jan van Eyck and after him Velásquez and many others used mirror optics for various pictorial representations of reality. Together, relations between light phenomena, optics and painting are rich in their complexity. and Ladislav Daniel.
This article discusses light propagation in an optical fibre from the point of view of both geometrical and wave optics. We describe the fibre eigenmodes and their wavefronts, evolution of a general state of light along the fibre, and the modes of a bent fibre. Numerous figures are used to illustrate the presented priciples., Tomáš Tyc., and Obsahuje seznam literatury
Zlaté sedmeré světlo, vůkol planoucí, duši ti dává směsice barev..., Light was the symbol of the Enlightenment or the Age of Light. The physics of light was widely studied and popularised at that time. The theoretical description of light inspired Maupertuis and Euler to formulate the Principle of the Least Action., Jiří Langer., and Obsahuje seznam literatury