> I realize the legend suggests the boats were set afire, but I was thinking > that might not be the most effective way to use a focused sunlight weapon. > > Wood requires temperatures of several hundred degrees to ignite, and being > boats they would likely be wet (at least on the surface). But human flesh > is > much more sensitive. Severe pain and injury could be achieved at > significantly lower temperatures than those needed to ignite wood. It > seems > that even 3-4 times normal sunlight would be enough to cause eye injury or > at least temporary blindness, and would certainly be enough to prevent > attackers from effectively targeting the defending troops. > > Thoughts? > > -Denny Sounds ok, but hard to do in practice. A scaled up version of kids frying ants with a magnifying glass? You need to focus on one person at a time, who'll be running around rather quickly (or hiding). Individual soldiers with polished shields wouldn't be co-ordinated enough, it's hard to see your "hot spot" in amongst the 100 or so others. A frame containing the mirrors is a bit large & heavy, so hard to swing around easily. Sure, you could hang it off some ropes, but then you also need to adjust the focus. I guess you could dazzle are few of them until their friends put a few arrows in you. The Romans always were sore losers. Tony -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist