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Would welding mask work for goggles? This is a question some people have asked me, and have been wondering myself (although personally, I would get some real goggles instead; not advertising, but just a note to self).

So how does this work? What determines the effective "wattage" output of a diode (or laser)? Does it work differently for different wavelengths of light? ie. Possible to do a 10W red, or is there a diode limitation? How big (physically) can diodes get? Sorry, just curious and want to learn...

Would someone be kind enough to direct/recommend me to some optics for focusing my 445nm 1W laser? :)

This is probably one of the stupidest newbiest questions, but do or can blue lasers cause cancer? Somehow I read (or misread) somewhere some time ago along these lines in regards to "touching" the blue laser with hands. How does this apply to a 1W? : o EDIT: Just exactly how awfully dangerous...

Yeah, I know none of you can provide pictures of this.. but... what would it be like to turn on a laser in space? How would the laser work? Or like.. would it go a farther distance? How would the photons behave differently (if at all)? :? Also, I have another question: in comparison to the...

Soo... death star... um Has anyone ever taken like, 1000 high powered laser pointers, bundled them together, and turned them all on at once? Any pictures of "thick" laser beams and stuff? :P (linear+thick; not something that drastically gets wider the farther away from the diode)

So I was trying to do.. YouTube - How to fix the "rectangle beam" on your Wicked Lasers Arctic Spyder III at 0:28'ish. And this is what I ended up with: (overview) I was supposed to unscrew this piece? After all, this was the only place where I could find thermal paste and it was mentioned...