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    KW of laser required to cut through a giant redwood tree in one second?

    I know that high powered lasers are used to cut metal, and how popular high power lasers are around here. That's all well and good, but how many kilowatts of laser power would be required to cut a swathe in one second through say, a giant redwood tree similar to this one...
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    Very rough way to determine output of supposed 1mw red laser pointer?

    Hi all, I bought a 1mw red laser off Amazon.co.uk for a few quid (mainly to play with the cat/dog), and was wondering if I could confirm it really is 1mw as I've heard a few horror stories here and there ;) I don't want accuracy. Even if the estimate is 100% or even 200% off, that would still...


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