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Plate glass (window glass) 1.52 [29] Crown glass (pure) 1.50–1.54: PETg: 1.57: Polyethylene terephthalate (PET) 1.5750: Polycarbonate: 150: 1.60 [30] Crown glass (impure) 1.485–1.755: Flint glass (pure) 1.60–1.62: Bromine: 1.661: Flint glass (impure) 1.523–1.925: Sapphire: 1.762–1.778: Boron nitride: 2–2.14 [31] Cubic zirconia: 2.15 ...
Higher-quality optical-grade glass materials exist (e.g. Borosilicate crown glasses such as BK7 ( n d = 1.51680 , V d = 64.17 , D = 2.51 g/cm³ ), which is commonly used in telescopes and binoculars, and fluorite crown glasses such as the best optical quality low dispersion glass currently in production, N-FK58 made by the German company Schott ...
Values of range from below 25 for very dense flint glasses, around 34 for polycarbonate plastics, up to 65 for common crown glasses, and 75 to 85 for some fluorite and phosphate crown glasses. Most of the human eye's wavelength sensitivity curve, shown here, is bracketed by the Abbe number reference wavelengths of 486.1 nm (blue) and 656.3 nm (red)
A burning apparatus consisting of two biconvex lens. A lens is a transmissive optical device that focuses or disperses a light beam by means of refraction.A simple lens consists of a single piece of transparent material, while a compound lens consists of several simple lenses (elements), usually arranged along a common axis.
Google Workspace (formerly G Suite until October 2020 [201]) is a monthly subscription offering for organizations and businesses to get access to a collection of Google's services, including Gmail, Google Drive and Google Docs, Google Sheets and Google Slides, with additional administrative tools, unique domain names, and 24/7 support.
U.S. Route 167 is a north-south United States Highway within the U.S. states of Louisiana and Arkansas.It runs for 500 miles (800 km) [1] from Ash Flat, Arkansas at U.S. Route 62/U.S. Route 412 to Abbeville, Louisiana at Louisiana Highway 14.
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