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Ray-Ban Wayfarer. Ray-Ban Wayfarer sunglasses and eyeglasses have been manufactured by Ray-Ban since 1952. Made popular in the 1950s and 1960s by music and film icons such as Buddy Holly, Roy Orbison and James Dean, Wayfarers almost became discontinued in the 1970s, before a major resurgence was created in the 1980s through massive product ...
Ray-Ban is a brand of luxury sunglasses and eyeglasses created in 1936 by Bausch & Lomb. The brand is best known for its Wayfarer and Aviator lines of sunglasses. In 1999, Bausch & Lomb sold the brand to Italian eyewear conglomerate Luxottica Group for a reported $640 million.
Aviator sunglasses. F.W. Hunter, Army test pilot, with AN 6531 sunglasses (1942) Aviator sunglasses are a style of sunglasses that was developed by a group of American firms. The original Bausch & Lomb design is now commercially marketed as Ray-Ban Aviators, although other manufacturers also produce aviator-style sunglasses.
Electrons per shell: 2, 8, 18, 8, 2: Physical properties; Phase at STP: solid: Melting point: 1050 K (777 °C, 1431 °F) Boiling point: 1650 K (1377 °C, 2511 °F) Density (at 20° C) 2.582 g/cm 3: when liquid (at m.p.) 2.375 g/cm 3 : Heat of fusion: 7.43 kJ/mol : Heat of vaporization: 141 kJ/mol : Molar heat capacity: 26.4 J/(mol·K)
Characteristic X-ray. Characteristic X-rays are emitted when outer- shell electrons fill a vacancy in the inner shell of an atom, releasing X-rays in a pattern that is "characteristic" to each element. Characteristic X-rays were discovered by Charles Glover Barkla in 1909, [1] who later won the Nobel Prize in Physics for his discovery in 1917.
The Northrop B-2 Spirit, also known as the Stealth Bomber, is an American heavy strategic bomber, featuring low-observable stealth technology designed to penetrate dense anti-aircraft defenses. A subsonic flying wing with a crew of two, the plane was designed by Northrop (later Northrop Grumman) as the prime contractor, with Boeing, Hughes, and ...
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