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The CO 2 laser is suited for cutting, boring, and engraving. The neodymium (Nd) and neodymium yttrium-aluminium-garnet lasers are identical in style and differ only in the application. Nd is used for boring and where high energy but low repetition are required. The Nd:YAG laser is used where very high power is needed and for boring and engraving.
Laser engraving metal plates are manufactured with a finely polished metal, coated with an enamel paint made to be "burned off". At levels of 10 to 30 watts, excellent engravings are made as the enamel is removed quite cleanly. Much laser engraving is sold as exposed brass or silver-coated steel lettering on a black or dark-enamelled background.
The population inversion in the laser is achieved by the following sequence: electron impact excites the {v1(1)} quantum vibrational modes of nitrogen. Because nitrogen is a homonuclear molecule, it cannot lose this energy by photon emission, and its excited vibrational modes are therefore metastable and relatively long-lived.
The LaserActive 3-D Goggles (model GOL-1) employ an active shutter 3D system compatible with at least six 3D-ready LD-ROM software titles: 3-D Museum (1994), Vajra 2 (1994), Virtual Cameraman 2 (1994), Dr. Paolo No Totteoki Video (1994), Goku (1995), and 3D Virtual Australia (1996), the last software title published for the LaserActive.
KM20 series LiteAces that were fitted with K-series engines had a standard K40 fitted with a column shifter Toyota Racing Development** has produced a fourth gear closer to third in Ratio K50/K51
Version 3.10 was released in 1993 and replaced SPRINT with SCORLAS and SCORDOT, which sent output to laser and dot matrix printers. [ 17 ] Version 3.11 was released in May 1994, and replaced ESCORT and SCOREINPUT with MIDISCOR and MIDISCORWRITE . [ 18 ]
Argon–argon (or 40 Ar/ 39 Ar) dating is a radiometric dating method invented to supersede potassium–argon (K/Ar) dating in accuracy. The older method required splitting samples into two for separate potassium and argon measurements, while the newer method requires only one rock fragment or mineral grain and uses a single measurement of argon isotopes.
Potassium-40 (40 K) is a long lived and the main naturally occurring radioactive isotope of potassium.Its half-life is 1.25 billion years. It makes up about 0.012% (120 ppm) of natural potassium.