Guy Builds Solar-Powered Death Ray In His Backyard (Yawn) : Krulwich Wonders... : NPR
Jared Sperli stashed this in fun
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neato
Two words: safety goggles :-)
"...this video about a guy who gets an old TV screen, hauls it into his backyard, mounts it on a frame, does something physics-y — I'm not sure what — maybe he just tilts it at the right angle to the sun, and suddenly, with nothing added, the guy's got a homemade concentrated sunbeam producing a 2,000-degree Fahrenheit death ray in his yard (with his wife and kids standing right there) that melts a stack of coins into hot foam, blows the caps off bottles and turns solid concrete into glowing orange liquid..."
OMG...
5:50 PM Mar 09 2013