In this section we will show you how to make a powerful solar concentrator that can cook four or five hotdogs in  minutes.

The Solar Hotdog Cooker is made out of a thin (1/8 inch thick) plastic mirror that can be found at plastic shops and glass stores (although it may have to be special ordered at some stores).
The plastic is bent into the shape of a parabola, so that the sun’s rays are collected over an eight square foot area, and focused in a thin line. The hotdogs are roasted on a spit placed at the focus, and turned every once in a while to prevent them from burning.