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  • 5 Ways to Start a Fire, Using Water

    My question is about the picture frame and cling wrap method - Where do you get the hot water?1. Perhaps a two stage process concentrate sunlight at lower intensity on a water vessel followed by using that heated water to form a better lens-or-2. Maybe you can use a larger picture frame with a longer focal length when using cold water?

    My question is about the picture frame and cling wrap method - What if you don't have hot water?1. Perhaps a two stage process to concentrate sunlight at lower intensity on a water vessel followed by using the heated water to form a better lens?-or-2. Maybe you can use a larger picture frame with a longer focal length when using cold water?

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