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Have bought 2 green lasers from Megagreen, one 1 mw for the cats to chase and a 20mw for me :D. The lasers themselves are solidly built and appear to output the specified power with no IR leakage, ceratainly much brighter than a 50mw brand that I made a big mistake buying. Paul at Bluesky knows...

I have no intentions of using high power to demonstrate burning and all the "fun" stuff, but can anyone come up with some edumicational demonstrations to safely show children?? If need be I can use a <1mw red <5mw Green and <20mw green, but the higher powered experiments will be shown using...

Just found an article about the effects of a 400mw laser being shone directly into the eye. Am unable to create a link to the article but have copied some of it. "Laser research organization reveals that direct exposure to over 400mw high power green laser pointers can damage the human eye to...