• Question: Why is a vaccum needed in nuclear fusion?

    Asked by potassium to Robin on 15 Mar 2012.
    • Photo: Robin Stafford Allen

      Robin Stafford Allen answered on 15 Mar 2012:

      You need a space where just a few hydrogen atoms are heated so that they go very fast and occassionally collide. This is when fusion can happen. Other atoms (of air for instance) just get in the way.

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