Archimedes Death Ray

[The_Doctor]

Some Greek(might not have been Greek) guy got it to work. It was in the 50s or 60s. He got a load of Greek sailors with polished shields and set fire to a small boat.

The thing on Mythbusters was probably too small. It says on this site that some MIT people got it to work.
http://en.wikipedia.org/wiki/Archimedes

Man, I feel stupid. I should alway read the first post.