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A blue laser emits electromagnetic radiation with a wavelength between 400 and 500 nanometers, which the human eye sees in the visible spectrum as blue or violet. [1] Blue lasers can be produced by: direct, inorganic diode semiconductor lasers based on quantum wells of gallium (III) nitride at 380-417nm [2] [3] or indium gallium nitride at 450 ...
Craigslist Inc. Craigslist (stylized as craigslist) is a privately held American company [5] operating a classified advertisements website with sections devoted to jobs, housing, for sale, items wanted, services, community service, gigs, résumés, and discussion forums.
A 25-year-old World War II pilot who went missing in action 80 years ago during a mission in southeast Asia was given full honors and laid to rest in Kansas earlier this week.
A laser weapon [2] is a type of directed-energy weapon that uses lasers to inflict damage. Whether they will be deployed as practical, high-performance military weapons remains to be seen. [3] [4] One of the major issues with laser weapons is atmospheric thermal blooming, which is still largely unsolved.
The Associated Press. July 29, 2024 at 12:20 PM. Wildfire smoke may be worse for brain health than other types of air pollution, according to new research linking it to an increased risk of ...
Each year, a crush of tourists arrives in Alaska’s capital city on cruise ships to see wonders like the fast-diminishing Mendenhall Glacier. Now, long-simmering tensions over Juneau’s tourism ...
Nd:YAG laser with lid open showing frequency-doubled 532 nm green light. Nd:YAG laser rod. Nd:YAG ( neodymium-doped yttrium aluminum garnet; Nd:Y3Al5O12) is a crystal that is used as a lasing medium for solid-state lasers. The dopant, neodymium in the +3 oxidation state, Nd (III), typically replaces a small fraction (1%) of the yttrium ions in ...
Floodwaters forced people out of their homes in parts of Iowa, the result of weeks of rain, while much of the United States longed for relief Saturday from yet another round of extraordinary heat.