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How do lasers work? | Who invented the laser? - Explain that Stuff
https://www.explainthatstuff.com/articles_science.html
WEBSep 9, 2023 · by Chris Woodford. Last updated: September 9, 2023. Lasers are amazing light beams powerful enough to zoom miles into the sky or cut through lumps of metal . Although they seem pretty recent inventions, they've actually been with us over half a century: the theory was figured out in 1958; the first practical laser was built in 1960.
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