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A laser glass sculpture of a caffeine molecule. A bubblegram (also known as laser crystal, Subsurface Laser Engraving, 3D crystal engraving or vitrography) is a solid block of glass or transparent plastic that has been exposed to laser beams to generate three-dimensional designs inside.
Glass brick has an r value between 1.75 and 1.96, close to that of thermopane windows. [1] [2] There are newer glass blocks injected with argon gas and having a layer of low-emissivity glass between the halves, which increases the insulative (U) value to 1.5 W/m 2 ·K, which is between triple glazed windows (1.8 W/m 2 ·K) and specialty double ...
A witch ball is a hollow sphere of glass. Witch balls were hung in cottage windows in 17th- and 18th-century England to ward off evil spirits, witches, evil spells, ill fortune and bad spirits. [1] The witch ball were used to ward off evil spirits in the English counties of East Sussex and West Sussex.
Eureka Tower in Melbourne has a glass cube which projects 3 m (10 ft) out from the building with visitors inside, suspended almost 300 m (984 ft) above the ground. When one enters, the glass is opaque as the cube moves out over the edge of the building. Once fully extended over the edge, the glass becomes clear.
Larry Bell (born 1939) is an American contemporary artist and sculptor.He is best known for his glass boxes and large-scaled illusionistic sculptures. He is a grant recipient from, among others, the National Endowment for the Arts and the Guggenheim Foundation, and his artworks are found in the collections of many major cultural institutions.
An evacuated glazing unit is made by sealing the edges of two glass sheets, typically by using a solder glass, and evacuating the space inside with a vacuum pump. The evacuated space between the two sheets can be very shallow and yet be a good insulator, yielding insulative window glass with nominal thicknesses as low as 6 mm overall.
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These are images that can form two separate pictures. For example, the image shown forms a rabbit and a duck. Ambigram: A calligraphic design that has multiple or symmetric interpretations. Ames room illusion An Ames room is a distorted room that is used to create a visual illusion. Ames trapezoid window illusion
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