laser beams

Reply Sun 2 Nov, 2003 01:21 pm
Why are laser beams always red?
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Reply Sun 2 Nov, 2003 01:39 pm
laser beam colors
They aren't. But red diode lasers are easier and cheaper to make than other types.
Some other very common laser colors are green & blue. There are also lasers with wavelengths in the infrared, lasers that emit microwaves, and even x-ray lasers.
Many colors are available with gas lasers, and any possible color in the rainbow can be produced with dye lasers (which use a liquid organic dye as the lasing medium).
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Reply Sun 2 Nov, 2003 01:57 pm
Right. Helium-neon lasers are red, ruby lasers are pink or red, argon lasers are blue/green, etc.
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