the high spectral purity
31Frequency synthesizer — A frequency synthesizer is an electronic system for generating any of a range of frequencies from a single fixed timebase or oscillator. They are found in many modern devices, including radio receivers, mobile telephones, radiotelephones, walkie… …
32performing arts — arts or skills that require public performance, as acting, singing, or dancing. [1945 50] * * * ▪ 2009 Introduction Music Classical. The last vestiges of the Cold War seemed to thaw for a moment on Feb. 26, 2008, when the unfamiliar strains …
33Earth Sciences — ▪ 2009 Introduction Geology and Geochemistry The theme of the 33rd International Geological Congress, which was held in Norway in August 2008, was “Earth System Science: Foundation for Sustainable Development.” It was attended by nearly… …
34Diamond simulant — Due to its low cost and close visual likeness to diamond, cubic zirconia has remained the most gemologically and economically important diamond simulant since 1976. The high price of gem grade diamonds, as well as significant ethical concerns of… …
35Blue — This article is about the colour. For other uses, see Blue (disambiguation). Blue …
36Noble gas — Group 18 Period 1 2 He 2 …
37Shroud of Turin — The Shroud of Turin: modern photo of the face, positive left, negative right. Negative has been contrast enhanced. The Shroud of T …
38Pigment — For the drug referred to as pigment, see black tar heroin. Natural ultramarine pigment in powdered form …
39Chrysoberyl — General Category Oxide minerals Spinel group Chemical formula Be …
40Vampire — For other uses, see Vampire (disambiguation). The Vampire, by Philip Burne Jones, 1897 Vampires …
