Quote:
Originally Posted by Mercedes Benzene
Could you paint it black?
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possibly, although uneven heating then might break the glass. something dark & heat absorbing in contact fo' shizzle.
Quote:
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Originally Posted by MB
I have a lens that's started fires with dry leaves before. What type of lens were you planning on using?
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just a little folding pocket lens that i carry.
at ~ 2", i use it to light my cigs when circumstances allow.
the trick there is to hold the cig in your hand and put the focus on the tobacco, not the paper, as the white paper simply reflects most of the light.
Quote:
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Originally Posted by M-Tan
You can drink it if you want but many if not most of the organisms that make water unsafe to drink are not easily killed by UV. a UV sterilization lamp uses many orders of magnitude more intense UV than natural sunlight provides at a much higher more deadly wave length than can get through earths atmosphere. The UV that gets through earths atmosphere isn't especially sterilizing.
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acknowledged. looking more like i'd need to add a heat absorber, a condensing coil, and go for distilled water, since boiling & UV not enough. .
