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A whiteboard (also known by marker board, dry-erase board, dry-wipe board, and pen-board) is a glossy, usually white surface for making non-permanent markings. Whiteboards are analogous to blackboards, but with a smoother surface allowing for rapid marking and erasing of markings on their surface. The popularity of whiteboards increased rapidly ...
An interactive whiteboard (IWB) device can either be a standalone computer or a large, functioning touchpad for computers to use. Interactive whiteboards are widely used in classrooms, boardrooms, and training environments, providing an innovative way to share information, facilitate discussions, and enhance the overall learning or business communication experience.
Among the available accessories was a complete mounting kit which included a sorting tray, film cutter, tweezers, [14] three different types of aluminum masks, [15] cardboard folders, [16] a mounting jig, [17] and mounting glass. [18] Mounting glass could be secured with mounting tape, binder frames, or with plastic "Permamounts". [19]
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Lomography Lomo'Instant Square Glass [61] January 2018 95 mm f /10 f /22 glass lens [61] Auto Mode 8 s – 1/250 s; Bulb Mode up to 30 s Zones [61] 2× CR2 + 1× CR2025 Lens is 45 mm equivalent angle of view (AOV) in 35 mm full frame format. [62] A separate Wide-Angle Glass Lens Attachment instead gives 21 mm AOV. [63] Fuji Fujifilm Instax ...
Glass thicknesses typically range from 1.8 to 2.5 millimetres (0.071 to 0.098 in). Clear glass has light transmission of approximately 90%, absorption of approximately 2%, and reflection of approximately 8%. Whereas absorption can be reduced by using low-iron glass, reflection can only be reduced by an anti-reflective surface treatment.
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