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A light tower is a piece of mobile equipment which has one or more high-intensity electric lamps and a mast. Almost always, the lights are attached to the mast, which is attached to a trailer, with a generator set to power the lamps. Normally the lamps are metal halide bulbs and the generator is powered by a diesel engine.
Light beams were used to symbolize the missing towers of the World Trade Center as part of the Tribute in Light. A light beam or beam of light is a directional projection of light energy radiating from a light source. Sunlight forms a light beam (a sunbeam) when filtered through media such as clouds, foliage, or windows.
3 - 50% reflected light. In practice, the reflective layer absorbs some light. Beam splitters. A beam splitter or beamsplitter is an optical device that splits a beam of light into a transmitted and a reflected beam. It is a crucial part of many optical experimental and measurement systems, such as interferometers, also finding widespread ...
The United Kingdom took part in World War II from 3 September 1939 until 15 August 1945. At the beginning of the war in 1939, London was the largest city in the world, with 8.2 million inhabitants. [1] It was the capital not just for the United Kingdom, but for the entire British Empire. London was central to the British war effort.
Tanks and mechanised infantry of the 24th Panzer Division advancing through Ukraine, June 1942, typifying fast-moving combined arms forces of classic blitzkrieg. Blitzkrieg (/ ˈ b l ɪ t s k r iː ɡ / BLITS-kreeg, German: [ˈblɪtskʁiːk] ⓘ; from Blitz "lightning" + Krieg "war") or Bewegungskrieg is a word used to describe a combined arms surprise attack using a rapid, overwhelming force ...
Luftwaffe. The Second Great Fire of London in December 1940 was caused by one of the most destructive air raids of the Blitz during World War II. The Luftwaffe raid caused fires over an area greater than that of the Great Fire of London in 1666, [2] leading one American correspondent to say in a cable to his office that "The second Great Fire ...
A searchlight (or spotlight) is an apparatus that combines an extremely bright source (traditionally a carbon arc lamp) with a mirrored parabolic reflector to project a powerful beam of light of approximately parallel rays in a particular direction. It is usually constructed so that it can be swiveled about.
The Battle of the Beams was a period early in the Second World War when bombers of the German Air Force ( Luftwaffe) used a number of increasingly accurate systems of radio navigation for night bombing in the United Kingdom. British scientific intelligence at the Air Ministry fought back with a variety of their own increasingly effective means ...