In this article, I'll show you how to make an awesome "Death Ray" using the large magnifying lens from an old projection TV. The lens is called a Fresnel lens; a device that employs several ridges to ...
Using the 10-foot parabolic mirror he'd built atop a discarded communications dish behind Bear Down Gym, Angel vaporized a hole in a quarter-inch piece of steel for a visiting congresswoman. Angel, a ...
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