The solar furnace simply uses mirrors to concentrate sunlight into extremely high temperatures. We're going to use it to cook a traditional American lunchtime hot dog on a stick. Well, we burnt it. It's not medium rare, is it? Can you de-dog my stick for me? I don't get asked to do that very often. Let's melt steal to demonstrate the real hot temperature capabilities. What you're looking at is a piece of steal being melted by the sun. There is more than enough heat here to knock the chemicals to form petrol into shape.