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Vortices are points in 2D fields and lines in 3D fields (as they have codimension two). Integrating the phase of the field around a path enclosing a vortex yields an integer multiple of 2 π. This integer is known as the topological charge, or strength, of the vortex. A hypergeometric-Gaussian mode (HyGG) has an optical vortex in its center ...
An alternative variant uses perpendicular hash lines instead of dots, and is known as the mil-hash reticle. Such graduated reticles, along with those with MOA-based increments, are collectively and unofficially called "milling reticles", and have gained significant acceptance in NATO and other military and law enforcement organizations.
A 1951 USAF resolution test chart is a microscopic optical resolution test device originally defined by the U.S. Air Force MIL-STD-150A standard of 1951. The design provides numerous small target shapes exhibiting a stepped assortment of precise spatial frequency specimens.
The PSO-1 elevation turret features bullet drop compensation (BDC) in 50 metres (55 yd) or 100 metres (109 yd) increments for engaging point and area targets at ranges from 100 metres (109 yd) up to 1,000 metres (1,094 yd). At longer distances the shooter must use the chevrons that would shift the trajectory by 100 metres (109 yd) per each chevron.
Diddy's lawyers argue 'freak off' videos depict 'consensual sex' In their Tuesday filing, Combs' legal team blasted the U.S. Attorney's Office for the Southern District of New York for their ...
The M145 Machine Gun Optic is a variant of the C79, which is different to the standard version in that ballistic compensation is in the reticle rather than in the mount. Reticle illumination is by a battery-powered LED with eleven brightness settings. It is used by the US military for its M249s and M240s.
As consumers, it's easy to have a jaded view of the banking system because it's easy for us to borrow money. A credit card is a few clicks away. A mortgage just requires some paperwork and a ...
(Reuters) -World leaders and U.S. politicians reacted to news that former U.S. President Jimmy Carter, who as president brokered peace between Israel and Egypt and later received the Nobel Peace ...