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Red (635 nm), blueish violet (445 nm), and green (520 nm) laser pointers. A laser pointer or laser pen is a (typically battery-powered) handheld device that uses a laser diode to emit a narrow low-power visible laser beam (i.e. coherent light) to highlight something of interest with a small bright colored spot.
This is an accepted version of this page This is the latest accepted revision, reviewed on 5 February 2025. Entrepreneur, philanthropist, and founder of eBay (born 1967) Pierre Omidyar Omidyar in 2007 Born Parviz Morad Omidyar (1967-06-21) June 21, 1967 (age 57) Paris, France Citizenship Iran France United States Education University of California, Berkeley (BS) Occupation(s) Founder of eBay ...
eBay was founded as AuctionWeb in California on September 3, 1995, by French-born Iranian-American computer programmer Pierre Omidyar as a hobby to make some extra money. [2] One of the first items sold on AuctionWeb was a broken laser pointer for $14.83. Astonished, Omidyar contacted the winning bidder to ask if he understood that the laser ...
Frequency-doubled diode-pumped solid-state (DPSS) lasers are used to make bright green laser pointers. Ytterbium, holmium, thulium, and erbium are other common "dopants" in solid-state lasers. [70] [page needed] Ytterbium is used in crystals such as Yb:YAG, Yb:KGW, Yb:KYW, Yb:SYS, Yb:BOYS, Yb:CaF 2, typically operating around 1020–1050 nm ...
Robert McNamara points at a Vietnam map using a pointing stick.. A pointer or pointing stick is a solid rod used to point manually, in the form of a stick, but always finished off or artificially produced.
In 1965, the first production laser cutting machine was used to drill holes in diamond dies.This machine was made by the Western Electric Engineering Research Center. [3] In 1967, the British pioneered laser-assisted oxygen jet cutting for metals. [4]
The AOL.com video experience serves up the best video content from AOL and around the web, curating informative and entertaining snackable videos.
A laser designator is a laser light source which is used to designate a target.Laser designators provide targeting for laser-guided bombs, missiles, or precision artillery munitions, such as the Paveway series of bombs, AGM-114 Hellfire, or the M712 Copperhead round, respectively.
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