Warsaw Photo-Optical Works
Warsaw Photo-Optical Works (Polish: Warszawskie Zakłady Fotooptyczne or WZFO) was a Polish firm that built optical and photographic equipment. The company was initially founded in 1951 as the Warsaw Cine-Technical Works at the direction of Prime Minister Bolesław Bierut. Oversight of the company was given to the Central Cinematography Committee of Poland, which passed the company to the Heavy Industry Ministry in 1952. The company's name was then changed to the Warsaw Photo-Optical Works, and they began to focus exclusively on producing cameras and related equipment. The WZFO was the first company to mass-produce photographic equipment in Poland, beginning with the Start camera in 1953-1954. Between 1954-1957, WZFO introduced the Fenix, a relatively higher-end viewfinder camera, and the Druh, a simple Bakelite-cased camera popular with young people. When the Druh series ceased production around 1958, the Ami AMI or Ami may refer to: Arts, entertainment and media *AMI-tv, a C ...
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Optics
Optics is the branch of physics that studies the behaviour and properties of light, including its interactions with matter and the construction of instruments that use or detect it. Optics usually describes the behaviour of visible, ultraviolet, and infrared light. Because light is an electromagnetic wave, other forms of electromagnetic radiation such as X-rays, microwaves, and radio waves exhibit similar properties. Most optical phenomena can be accounted for by using the classical electromagnetic description of light. Complete electromagnetic descriptions of light are, however, often difficult to apply in practice. Practical optics is usually done using simplified models. The most common of these, geometric optics, treats light as a collection of rays that travel in straight lines and bend when they pass through or reflect from surfaces. Physical optics is a more comprehensive model of light, which includes wave effects such as diffraction and interference that cannot be ...
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Defunct Manufacturing Companies Of Poland
Defunct (no longer in use or active) may refer to: * ''Defunct'' (video game), 2014 * Zombie process or defunct process, in Unix-like operating systems See also * * :Former entities * End-of-life product * Obsolescence Obsolescence is the state of being which occurs when an object, service, or practice is no longer maintained or required even though it may still be in good working order. It usually happens when something that is more efficient or less risky r ...

1968 Disestablishments In Poland
The year was highlighted by protests and other unrests that occurred worldwide. Events January–February * January 5 – "Prague Spring": Alexander Dubček is chosen as leader of the Communist Party of Czechoslovakia. * January 10 – John Gorton is sworn in as 19th Prime Minister of Australia, taking over from John McEwen after being elected leader of the Liberal Party the previous day, following the disappearance of Harold Holt. Gorton becomes the only Senator to become Prime Minister, though he immediately transfers to the House of Representatives through the 1968 Higgins by-election in Holt's vacant seat. * January 15 – The 1968 Belice earthquake in Sicily kills 380 and injures around 1,000. * January 21 ** Vietnam War: Battle of Khe Sanh – One of the most publicized and controversial battles of the war begins, ending on April 8. ** 1968 Thule Air Base B-52 crash: A U.S. B-52 Stratofortress crashes in Greenland, discharging 4 nuclear bombs. * January 23 ...
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