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Total external reflection, hollow light tube Total internal reflection, block of acrylic. Light tubes (also known as solar pipes, tubular skylights or sun tunnels [1]) are structures that transmit or distribute natural or artificial light for the purpose of illumination and are examples of optical waveguides.
VELUX is a Danish manufacturing company that specialises in roof windows, skylights, sun tunnels and related accessories. The company is headquartered in Hørsholm, Denmark and is a part of VKR Holding A/S. VELUX Group is a founding partner of the global Active House Alliance.
Skylights are widely used in daylighting design in residential and commercial buildings, mainly because they are the most effective source of daylight on a unit area basis. An alternative to a skylight is a roof lantern. A roof lantern is a daylighting cupola that sits above a roof, as opposed to a skylight which is fitted into a roof's ...
Skylight in the vault in the Chapel of the Constable of the Burgos Cathedral, a glazed closed skylight from the 15th century A skylight (sometimes called a rooflight ) is a light-permitting structure or window, usually made of transparent or translucent glass, [ 1 ] that forms all or part of the roof space of a building for daylighting and ...
The mall has unusual, decorative pavement lights let into its polychrome tile floor, to allow light from the glass dome skylights into the basement level. There also are vault lights in other locations, such as in the old post office building. [7] Chicago, Illinois, has extremely extensive sidewalk vaults, but many of them do not have vault ...
Lenovo Skylight was a small portable computer with mobile data capabilities (sometimes called a smartbook) designed by Lenovo. [2] The project was announced in January 2010, but was cancelled less than six months later.
Areas where the degree of polarization is zero (the skylight is unpolarized), are known as neutral points. Here the Stokes parameters Q and U also equal zero by definition. The degree of polarization therefore increases with increasing distance from the neutral points. These conditions are met at a few defined locations on the sky.
Proceeding from analyses of the aftermath of the eruption of the Philippines volcano Mount Pinatubo (in June 1991) and other studies: [2] [3] Diffused skylight, owing to its intrinsic structure and behavior, can illuminate under-canopy leaves, permitting more efficient total whole-plant photosynthesis than would otherwise be the case; this in ...
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