free transmission range
41Lyot filter — A Lyot filter, named for its inventor Bernard Lyot, is a type of optical filter that uses birefringence to produce a narrow passband of transmitted wavelengths. Lyot filters are often used in astronomy, particularly for solar astronomy.A Lyot… …
42Telecommunications in Namibia — Telephones main lines in use: (see CIA World Factbook https://www.cia.gov/library/publications/the world factbook/geos/wa.html) 140,000 (2008), 127,900 (2004), 110,200 (2000), 100,848 (1997) Telephones mobile cellular: 1.052 million (2008),… …
43Communications in Namibia — Telephones main lines in use:127,900 (2004), 110,200 (2000), 100,848 (1997)Telephones mobile cellular:495,000 (2005), 82,000 (2000 est.), 20,000 (1998), 450,000 (2006)Telephone system: general assessment good system; about 6 landline telephones… …
44Optischer Resonator — Ein optischer Resonator ist eine Anordnung von Spiegeln, die dazu dient, Licht möglichst oft hin und her zu reflektieren. Aufgrund von Interferenz bildet sich im Resonator dann eine stehende Welle, wenn die optische Weglänge des Resonators ein… …
45Diode Laser — Une diode laser est un composant opto électronique à base de matériaux semi conducteurs. Elle émet de la lumière monochromatique cohérente (une puissance optique) destinée, entre autres, à transporter un signal contenant des informations (dans le …
46Diode laser — Une diode laser est un composant opto électronique à base de matériaux semi conducteurs. Elle émet de la lumière monochromatique cohérente (une puissance optique) destinée, entre autres, à transporter un signal contenant des informations (dans le …
47animal communication — Transmission of information from one animal to another by means of sound, visible sign or behaviour, taste or odour, electrical impulse, touch, or a combination of these. Most animal communication uses sound (e.g., birds calling, crickets… …
48education — /ej oo kay sheuhn/, n. 1. the act or process of imparting or acquiring general knowledge, developing the powers of reasoning and judgment, and generally of preparing oneself or others intellectually for mature life. 2. the act or process of… …
49Business and Industry Review — ▪ 1999 Introduction Overview Annual Average Rates of Growth of Manufacturing Output, 1980 97, Table Pattern of Output, 1994 97, Table Index Numbers of Production, Employment, and Productivity in Manufacturing Industries, Table (For Annual… …
50Metamaterial antenna — This Z antenna tested at the National Institute of Standards and Technology is smaller than a standard antenna with comparable properties. Its high efficiency is derived from the Z element inside the square that acts as a metamaterial, greatly… …
