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- Nothing can travel faster than light — in a vacuum. But when light slows down, sometimes matter can blaze past that speed limit, creating a stunning glow called Cherenkov radiation. We can see this glow in a nuclear reactor as high-energy particles speed by. It offers us a window into a realm of the universe that is usually invisible to us.
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About Be Smart
Be Smart is created and hosted by Joe Hanson, Ph.D. We give you deep answers to simple questions about science and the rest of the universe.
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