What are the rules of radiation?
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Answer:
Three main rules are:
Time: Be around the thing for as short a time as possible to do the job you need to do. The longer you are near it, the more radiation you will absorb.
Distance: Stay as far from the object as you can while doing what you need to do. If we are speaking about a small radioactive source then we can say, for sake of discussion, that it is a “point source” and exposure will drop as a function of the square of the distance so a little distance makes a big difference.
Shielding: Always keep between you and the thing. Preferably something metal and dense. This will help to stop all forms of harmful radiation to some extent. This can be a permanent shield or something big like an engine block between you and the thing.