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This can purify water, instantly start a fire, melt metal, cook food and even melt concrete…..This can melt a padlock if you needed to get in somewhere too … just saying.
This is made from a simple lens called a Fresnel lens… These are commonly found in old rear projection big screen TVs ….
WHAT IS A FRESNEL LENS – The basic idea behind a Fresnel lens is simple. Imagine taking a plastic magnifying glass lens and slicing it into a hundred concentric rings (like the rings of a tree). Each ring is slightly thinner than the next and focuses the light toward the center. Now take each ring, modify it so that it’s flat on one side, and make it the same thickness as the others. To retain the rings’ ability to focus the light toward the center, the angle of each ring’s angled face will be different. Now if you stack all the rings back together, you have a Fresnel lens. You can make the lens extremely large if you like. Large Fresnel lenses are often used as solar concentrators.
Bonus: Root Cellar That Can Be Used as a Bunker
Do you remember the old root cellars our great-grandparents used to have? In fact, they probably built it themselves, right in their back yard.
If you want to learn how to build a backyard bunker like your grandparents had, without breaking the bank, then you need Easy Cellar.
Easy Cellar will show you:
- How to choose the ideal site
- Cost-effective building methods
- How to protect your bunker from nuclear blast and fallout
- How to conceal your bunker
- Affordable basic life support options
Easy Cellar will also reveal how a veteran, with only $421, built a small nuclear bunker in his backyard.
- America's Natural Nuclear Bunkers: Find the Closest One to Your Home
- 56 Items to Stockpile in Your Easy Cellar