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2015-01-31T21:14:13+05:30
 Dec 6, 2014 in science by aarya
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sorry this wrong answer
correct answer is
Theodore Maiman built the first working laser using a ruby rod while working at Hughes Research Laboratories in Malibu, California. It lased for the first time on May 16, 1960.
2015-01-31T21:16:33+05:30
 ruby rod on May 16, 1960.
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