"No, Mr. Bond. I expect you to die!"
I would expect a technical publication to be a little more precise in their language, this is hardly a laser.
I'm sure no FReeper would ever actually do this...
Must find old 50” tv...
Is that really noteworthy? Is this the first lens anyone has developed where being unfocused has an impact on performance?
Ya know my parents have an old 50” in their garage they ain’t using anymore...
I'm going out to the shop to look for old flat-screen monitors. I know I've got some out there....
/johnny
When I was a young’n there was a mail-order company called Edmund Scientific Corporation. They sold fresnel lenses as well as a bunch of other cool stuff like prisms and optical equipment for geeky kids like me.
All types of stuff on Youtube with this kind of stuff.
Look up solar heaters. People have used fresnel lenses and/or parabolic reflectors to heat water. all sorts of things.
"No, Mr. Bond. I expect you to die!"
When I was a child we did this on a smaller scale with a magnifying glass that we got at the 5 and dime. We could put ours in a pocket or book bag.
I sense the mythbusters having to do another redo Archimedes death ray. It should work this time.
A bazillion ants will testify as to the power of a magnifying class in the hands of a child. This is nothing new.
Did some experiments with it, and truth is, it is very dangerous. Also, with this kind of light concentration, you NEED serious eye protection, even the light reflecting off of your target and being scattered back to you, an inflict some real damage.
It was great fun for a while, even used it to cause "rocks" to explode. I got tired of it after a few days, put it away, where it eventually got scratched up and became useless, so I threw it out.
If I had to to it again, I would build a proper frame for it. Probably use it for something more advanced, maybe a small steam generator/engine.
In the mid-seventies, there was a live action TV show every Saturday with superheros Shazam and Isis.
One of the episodes had some kids (I think) trapped in a mountain.
Shazam started rubbing his hands in the sand at superfast speeds, heating and melting it into a giant lens. He then held it up between the sun and the mountain.
I think Isis used her powers to make it a clear day or something.
They made a, “Laser,” which blew the side of the mountain off, and rescued the kids.
All the while, I was yelling at the TV...”LAAAME!!”
Using a variety of thermometers and materials with different ignition points (including popcorn and hotdogs) we determined the best high noon midsummer temperature it would produce at something like 1000 degrees Farenheit.
You'll need a small saw to cut the spiral into the mylar. Been a while but I think there's a pattern available on the net.
These are not kids' toys.
We were able to use it to light up a Sunday newspaper with just moonlight, and you could read text even on a starless night.
I kept it in the garage for many years then one day I noticed it was focusing the light from the garage window onto a piece of wood ~ which was clearly hot.
That's when I took it apart.
But at what is the effective range to kill zombies.
I would have to lie to you, to confirm your post.
Yep. We continue to be dumbed down to the stone age.
this guy better watch it or ATF will kick down his door looking for him and his unregistered destructive devices.
energy source, anti-Zombie weapon after SHTF?
Hmmm, we could only figure out how to focus the atmosphere above Iran, N.Korea, Russia,China, and Kenya, it would make a great weapon.