depending on the type of radiation, it can travel very far or not so far. there are 3 main types of radiation: alpha, beta, and gamma. alpha radiation is the weakest and can be stopped by your clothes, won’t go through skin or any surfaces. beta radiation can penetrate paper but not aluminum or denser surfaces. gamma radiation is in wave form and can travel through space and directly through your person. therefore, it can travel very far or very near.
depends on how big the plant is.
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