Students in physics Thursday, a very sunny day here in Maine, built solar concentrators using old satellite dishes and reflective Mylar, then attempted to ignite large kitchen matches. A good way to learn how much energy there is in sunlight. The outside temperature was in the low thirties F.
(Movie from Michelle L. Thanks Michelle!)
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I'm sorry to have to say that the number of spam comment postings has required that we turn off anonymous comment posting. There's been a massive boom in what seems like computer-automated spam comments with links to web pages that advertise cheap, nasty, bad-for-you products, mostly cigarettes.
From now on, you'll have to be a registered user to comment on this blog.
If you had something you wanted to say, but really didn't want your name attached to it for some good reason, you should email Mick at mwomersley@unity.edu
I'll protect your confidentiality and post your comment for you.