group velocity of light
121Günter Nimtz — (1936) is a German physicist. Working at the 2nd Physics Institute at the University of Cologne ( Universität zu Köln ) in Germany, he has been conducting experiments that purport to show that under certain conditions, particles may travel faster …
122Mössbauer spectroscopy — A Mössbauer absorption spectrum of 57Fe Mössbauer spectroscopy is a spectroscopic technique based on the Mössbauer effect. This effect, discovered by Rudolf Mössbauer in 1957, consists in the recoil free, resonant absorption and emission of gamma …
123Superluminal communication — is the term used to describe the hypothetical process by which one might send information at faster than light (FTL) speeds. All empirical evidence found by scientific investigation indicates that it s impossible in the real world.Some theories… …
124Electronic engineering — is a discipline dealing with the behavior and effects of electrons (as in electron tubes and transistors) and with electronic devices, systems, or equipment.The term now also covers a large part of electrical engineering degree courses as studied …
125M. Shamsher Ali — Dr. M. Shamsher Ali Born 9 November 1940 (1940 11 09) (age 71) Kushtia, Bangladesh Citizenship Bangladesh …
126Marrite — General Category Sulfosalt mineral Chemical formula PbAgAsS3 Strunz classification 02.JB.15 Crystal symmetry Monoclinic 2 …
127Abbe number — An Abbe diagram plots the Abbe number against refractive index for a range of different glasses (red dots). Glasses are classified using the Schott Glass letter number code to reflect their composition and position on the diagram …
128Planck, Max — ▪ German physicist Introduction in full Max Karl Ernst Ludwig Planck born April 23, 1858, Kiel, Schleswig [Germany] died Oct. 4, 1947, Göttingen, W.Ger. theoretical physicist who originated quantum theory, which won him the Nobel Prize for… …
