That's why I want to find the original wording. Did he build a large mirror from many small mirrors, in which case it's quite possible to set a boat on fire from a distance? If he did it this way and had the focal point set to a distance he knew the boats would have to approach, then it's perfectly plausible.cyrusabdollahi said:Thats not likely zooby. making a large mirror is a veryyyyy hard thing to do. He would need a mirror that is almost perfectly parabolic to focus the light if he wanted one big one. It HAD to be small mirrors.
As far as an army of men holding mirrors goes, I would like to see this tried with some substantial mirrors. A foot square per man is lame. An authentic army of men holding shield sized mirrors might do some real damage.