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my presentation was a success, we didn't wear any safety accessories

would a welders helmet work?

what i mean is, wont you blink before it can do permanent damage

i dont have the kind of money to pay for that many goggles, what else?

arent your blink reflexes good enough that you dont need glasses?

4 to 5

so overall, dark room, several people. glasses necessary, or not necessary?

and how do i do that? the label says it is a class IIIb, and i have burnt a hole through a cd case, i think it is 200mw or pretty close

i looked at the laser, it says <200mW

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oh and right next to that question, i have one about the laser itself, is it powerful enough to light a candle? because when i tried all it did was create smoke, there was no ignition. and possibly what else can it do, besides light a match, and burn a hole through paper and a cd case?

I am going to be presenting a 200mw 408nm violet laser in front of my class for a project i am doing on high powered lasers, and i was wondering... Do we all really need safety goggles? thank you