by 
Natter91
ANSWERS: 5
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very little, if any the laser, unless you had it superheating the air, would be 100% light, or very near that at least. Certainly not 'bzou!'
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Pichooooooooooooooooooooooooooooooooommmmmmmmmmmm +4
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I have an 800mw helium neon laser. It just makes a faint ticking sound when I turn it on. +5
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NONE
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A powerful enough beam would heat the air it passes through and create a thundercrack. But anything less would be silent or only make whatever noise the electronics running it makes.
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