When we don't need them is the best time to learn.
You know those old rear projection TV's that everyone is giving away for free on kijiji or craigslist? Inside they have a pristine fresnel lens.
A fresnel lens is basically a giant magnifying glass minus the thickness. With it you could easily
This is the type of TV I mean, and an example of tearing it apart.
[ame="http://www.youtube.com/watch?v=348PUYaoGm8"]Giant Fresnel Lens - YouTube[/ame]
Any other gay webmasters have easy survival tips to share?
You know those old rear projection TV's that everyone is giving away for free on kijiji or craigslist? Inside they have a pristine fresnel lens.
A fresnel lens is basically a giant magnifying glass minus the thickness. With it you could easily
- star a fire,
- boil water
- build a solar cooker
- cauterize a wound
This is the type of TV I mean, and an example of tearing it apart.
[ame="http://www.youtube.com/watch?v=348PUYaoGm8"]Giant Fresnel Lens - YouTube[/ame]
Any other gay webmasters have easy survival tips to share?