Some years ago my parents had a love seat with chrome-plated legs, each leg being a flat piece of steel curled into a segment of a circle. One day shortly after they moved into a new residence, my sister walked in and promptly wondered about a strange burning plastic smell. After some investigation they tracked it down to this love seat. Turns out that late-afternoon sunlight had been hitting the curved surface of one of those chromed steel legs, and was being focused into a line on the vinyl-upholstered underside of that love seat, where it was melting and pyrolyzing the vinyl. A few more degrees, and it darn well could have caught fire.
Help me out here. I see a piece of glass smoldering on a black surface–is that the rear-projection TV screen? I also see a big Fresnel lens, which I would assume is the heat source, or rather, is refracting the heat source. What am I missing?
Don’t worry, I’m mature now and I do not have evil plans. You can tell me.