What are the positive and negative effects of radiation?

How much radiation can a person receive over a lifetime without any negative health effects?

  • Levels relative to that of natural background radiation (e.g., 2x, 10x, etc...) would help lend perspective.

  • Answer:

    This Guardian article has a helpful chart: http://www.guardian.co.uk/news/datablog/2011/mar/15/radiation-exposure-levels-guide Some reference points: Natural radiation/year: 2.0 mSv Chest x-ray: 0.1 mSv Head CT: 2.0 mSv Lowest annual dose at which any increase in cancer is clearly evident: 100.0 mSv Radiation detected at Fukushima per hour on March 12: 1.02 mSv

Shiyan Koh at Quora Visit the source

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