What exactly is radioactivity?

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Bundesamt für Strahlenschutz

Published on Nov 27, 2013
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You can't see it and you can't feel it: radiation. Nevertheless, people are always exposed to radiation. Shielding makes sense. Natural radioactive substances in soil and rocks give off radiation. And it comes not only from the earth, but also from the sky. The higher you go, the stronger the cosmic radiation. It is already relevant on long-distance flights at altitudes of several kilometers. But what is radioactivity and radiation anyway?

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