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In 1991, exterior electrochromic mirrors were added to the Gentex product line. These mirrors operate on the same principle as the interior mirrors. [8] In 1997 the geometry of the mirror's surface was adapted to create spherically curved glass with the goals of eliminating blind spots and offering an expanded field of view. [15]
The Astroscan had a Newtonian reflector layout with a 4⅛" clear-inch (105mm) diameter f/4.2 aluminized and overcoated borosilicate glass parabolic primary mirror with a focal length of 17½ inches (445mm). [1] The telescope's secondary mirror was mounted on a flat optical window at the front of
Base unit may refer to: Base unit (measurement), in physics, a unit of measurement from which derived units may be compounded SI base unit, a base unit in the SI ...
Jack Nicholson spent some quality time with his loved ones over the holiday season.. In an Instagram post shared by his daughter Lorraine Nicholson on Thursday, Jan. 2, the actor, 87, was captured ...
A storm emerging from the Rockies is forecast to bring ice, snow and rain to a large portion of the country beginning this weekend, possibly affecting millions of Americans.
A new study suggests that a diet filled with protein and fiber may be the most effective for weight loss. Here's what a dietitian wants you to know.
A K-mirror is a system of 3 plane mirrors mounted on a common motor axis which runs parallel to the chief ray of the system. If looking at the system parallel to the mirror surfaces, where only the edges of the mirrors remain visible, the middle mirror and the front and back mirror look like the backbone and legs of a capital-K; this illustrates the origin of the name.
What is a white Christmas? It need not snow Dec. 25 to fit the weather service's definition of a white Christmas: There just needs to be at least 1 inch of snow on the ground.