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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 candoluminescence ...
With intense lighting, the eye can constrict the pupil, yet allow enough light to reach the retina. The more the eye resembles a pinhole camera , the less it depends on focusing through the lens . [ d ] In other words, the degree of decoupling between focusing and convergence needed to visualize an autostereogram is reduced.
Klieg lights. A Klieg light is an intense carbon arc lamp especially used in filmmaking.It is named after inventor John Kliegl and his brother Anton Kliegl.Klieg lights usually have a Fresnel lens with a spherical reflector or an ellipsoidal reflector with a lens train containing two plano-convex lenses or a single step lens.
Quantity Unit Dimension [nb 1]Notes Name Symbol [nb 2] Name Symbol Luminous energy: Q v [nb 3]: lumen second: lm⋅s : T⋅J: The lumen second is sometimes called the talbot.: Luminous flux, luminous power
Several measures of light are commonly known as intensity: . Radiant intensity, a radiometric quantity measured in watts per steradian (W/sr); Luminous intensity, a photometric quantity measured in lumens per steradian (lm/sr), or candela (cd)
Although some forms of stimming behaviors have typically been shown to be healthy and beneficial—as they help regulate intense sensory experiences, relieve intense emotions such as anxiety, may facilitate understanding and social interactions with other autistic people, may promote pleasant emotions, and facilitate sense of security— [6] [7 ...
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