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I still think the first laser was a ruby laser emitting 694.3nm which is visible red light.
"These days they can, yes. The very first laser that was produced worked in the near infrared."
Tommy"the near infrared" is the portion of the infrared that is near the visible NOT the portion of the visible that is near the infrared. BC has a valid point- near infrared (infrared A) is 750-1400 nm and is not visible.- the light from a artificial ruby laser is (per BC) 694 nm and in the red portion of the visible spectrum.Matthew
Just last year, a group of scientists in America demonstrated a really high power laser thatís actually working in the x-ray region.
Tommya,There's a big difference between "in the near infrared" and "near the infrared".In neither case is the word "near" a noun and most nouns are not given capital letters in English anyway.The point is that, if I'm right about the first laser being a ruby laser then it's plain visible red light.This "It was really, really bright, so you could probably see it, but only just about. "makes no sense if the first laser was a ruby laser.If the first laser wasn't a ruby laser then I'd really like to know what it was.There were masers before lasers, so there might have been some weird "not strictly L or M" ASER that worked in the IR.I guess it would be an ISER.