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A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation. The term "laser" originated as an acronym for "light amplification by stimulated emission of radiation". The first laser was built in 1960 by Theodore H. Maiman at Hughes Research Laboratories, based on theoretical work by Charles Hard Townes and Arthur Leonard Schawlow.
A laser differs from other sources of light in that it emits light coherently, spatially and temporally. Spatial coherence allows a laser to be focused to a tight spot, enabling applications such as laser cutting and lithography. Spatial coherence also allows a laser beam to stay narrow over great distances (collimation), enabling applications such as laser pointers. Lasers can also have high temporal coherence, which allows them to emit light with a very narrow spectrum, i.e., they can emit a single color of light. Alternatively, temporal coherence can be used to produce pulses of light with a broad spectrum but durations as short as a femtosecond ("ultrashort pulses").
Among their many applications, lasers are used in optical disk drives, laser printers, and barcode scanners; DNA sequencing instruments, fiber-optic and free-space optical communication; laser surgery and skin treatments; cutting and welding materials; military and law enforcement devices for marking targets and measuring range and speed; and laser lighting displays in entertainment.
Rail mounted Green Laser sight manufactured by Lasermax the Spartan SpS-G is low profile, easily operated, bright laser and easy to see even is bright and high light situations and environments. 2 modes steady and pulse, has 1 inch rail built into housing to attach other lights/accessories...
Lasermax Spartan green laser sight, mounts to any railed firearm. Has two modes constant beam or pulse. Turns on and off with a press of a button and has ambidextrous controls. Laser is bright and is visible in bright daylight unlike red lasers. I’m asking for $80 or best offer all offers and...
So, out of the blue, two junkies show up at our back porch. The Smurf yells "someone's here!," I grab a piece, and crack the back door and ask what is up. I instantly notice they are both high as a fing kite. They said something like "yah, um, your neighbor (also a worthless druggie idiot) saw...