Week 17

fullkeel

The non-moving magnifying glass.  That is what I get out of all this focus on concentration.  But there’s more.

A while back, while doing some research on solar energy, I stumbled across a youtube video where a young kid took an old satellite dish, glued about 5000 tiny mirrors to it, then aimed it at the sun so that it collected the suns rays and centered them to a point about 5 feet from the dish to a concentric spot about 1/2 inch in diameter.  The results were pretty ridiculous, as in impressive.  Hold a 2×4 at this spot of focus for anything longer than about a second, and it would burst into flames.  Hold a brick at the focal point, and in about 10 seconds it would start to explode.  Want to burn a hole in a paint can lid?  15 seconds.  Want to melt mud into glass?  25…

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