a reflective layer

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• Anti-reflective coating — Many coatings consist of transparent thin film structures with alternating layers of contrasting refractive index. Layer thicknesses are chosen to produce destructive interference in the beams reflected from the interfaces, and constructive… …   Wikipedia

• Multi-layer insulation — Closeup of Multi layer insulation from a satellite. The metal coated plastic layers and the scrim separator are visible. Multi layer insulation, or MLI, is thermal insulation composed of multiple layers of thin sheets often used on spacecraft. It …   Wikipedia

• F layer — Physics. the highest of the radio reflective ionospheric layers, beginning at an altitude of ab. 80 mi. (130 km) and consisting of two parts, the lower part (F1 layer) being detectable in the daytime only, the higher (F2 layer or Appleton layer)… …   Universalium

• E layer — the radio reflective ionospheric layer of maximum electron density, normally found at an altitude between 60 and 75 mi. (100 and 120 km). Also called Heaviside layer, Kennelly Heaviside layer. [1930 35] * * * …   Universalium

• F layer — /ˈɛf leɪə/ (say ef layuh) noun the highest of the radio reflective ionospheric layers (about 130 km above the earth), consisting of a lower part detectable in the daytime only, and an upper part (Appleton layer) which, because it is constant, is… …  

• E layer — n. phs the radio reflective ionospheric layer of maximum electron density, at an altitude of about 60 mi. (100 km) • Etymology: 1930–35 …   From formal English to slang

• F layer — n. phs the highest radio reflective region of the ionosphere, at an altitude of ab. 80 mi. (130 km) • Etymology: 1925–30 …   From formal English to slang

• Solar mirror — A Solar mirror is a reflective surface used for gathering and reflecting solar energy in a system being powered by solar energy. It comprises a glass substrate, a reflective layer for reflecting the solar energy, and an interference layer. The… …   Wikipedia

• Optical media preservation — The preservation of optical media is essential because it is a resource in libraries, and stores audio, video, and computer data to be accessed by patrons. While optical discs are generally more reliable and durable than older media types,… …   Wikipedia

• CD rot — (or DVD rot) is a phrase describing the tendency of CD or DVD disks to become unreadable due to physical or chemical deterioration. The causes of this effect vary from oxidation of the reflective layer, to physical scuffing and abrasion of disk… …   Wikipedia

• CD-R — Compact Disc Recordable (CD R) logo/trademark Optical discs …   Wikipedia