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Start a Fire with Coffee and Potato Chip containers Solar vacuum reflector

This is a different way of starting a solar fire for camping or fun. The vacuum seal added for product shelf-life and freshness creates a good reflector that can concentrate sunlight to a focal point. The stronger the vacuum, the shorter the focal length will be creating a tighter spot/image of the sun. As the containers walls heat up from sun exposure, the vacuum reduces as the air inside expands creating a longer focal length so some adjustments are required. This is a neat experiment to show off at a daytime party:-)

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