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Limelight (also known as Drummond light or calcium light) [1] is a non-electric type of stage lighting that was once used in theatres and music halls. An intense illumination is created when a flame fed by oxygen and hydrogen is directed at a cylinder of quicklime ( calcium oxide ), [ 2 ] due to a combination of incandescence and ...
The light is produced either directly by the flame, generally by using special mixes (typically propane or butane) of illuminating gas to increase brightness, or indirectly with other components such as the gas mantle or the limelight, with the gas primarily functioning to heat the mantle or the lime to incandescence. [1]
This, in turn, controls the flow rate of the gas and the size of the flame at the burner, and thus the amount of light it produces. This type of lamp generally has a reflector behind the flame to help project the light forward. An acetylene gas powered lamp produces a bright, broad light.
The Siege and Destruction of Jerusalem by the Romans Under the Command of Titus, A.D. 70, by David Roberts (1850), shows the city burning. Early thermal weapons, which used heat or burning action to destroy or damage enemy personnel, fortifications or territories, were employed in warfare during the classical and medieval periods (approximately the 8th century BC until the mid-16th century AD).
He reported that the light could be observed 68 miles away and would cast a strong shadow at a distance of thirteen miles. [1] Drummond left Ireland for a period prior to the Reform Act 1832 . For his services to the Whigs, acting as secretary to Lord Spencer , Lord Brougham had him awarded a pension 300 pounds per annum.
Lime Point Lighthouse is a lighthouse in California, on the northern side of the narrowest part of Golden Gate strait. [1] [2] The lighthouse sits at the base of a steep cliff, very near the North anchorage of the Golden Gate Bridge. It is built on a 100-foot (30 m) long rock spur named Lime Point.
Religious services often make use of a combination of light and darkness. Hindus putting lit oil lamps on the river Ganges. The ceremonial use of lights occurs in liturgies of various Christian Churches, as well as in Jewish, Zoroastrian, and Hindu rites and customs. Fire is used as an object of worship in many religions. Fire-worship still has ...
In 1997, Herman Winick and Gustav-Adolf Voss suggested building a light source in the Middle-East using components from the soon-to-be decommissioned BESSY I facility in Berlin, during two seminars organized in 1997 in Italy and in 1998 in Sweden by Tord Ekelöf with the CERN-based Middle East Scientific Co-operation (MESC) group headed by ...