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Question:
What materials would be the most important to construct a solar oven?



Replies:
Glass and metal would make good materials for a solar oven. The glass admits short-wave radiation but not long-wave radiation, so heat gets trapped behind the glass (like a greenhouse). It works even better if the glass is curved like a magnifying glass lens, because the curved lens captures more light than a flat piece of glass. You can also make it hotter by using a curved piece of metal behind the glass, preferably bowl-shaped - this "parabolic" reflector concentrates the radiation at a central focal point. An oven can get very hot with this design, maybe hot enough to burn you so watch out!

Mortis



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