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      Question

      ______ rays have the highest penetrating power.

      A Gamma rays Correct Answer Incorrect Answer
      B Alpha rays Correct Answer Incorrect Answer
      C Ultraviolet rays Correct Answer Incorrect Answer
      D Radio waves Correct Answer Incorrect Answer

      Solution

      The Gamma rays can penetrate solids because they are small and have a lot of energy. Also, Gamma rays are not charged and do not have mass; they can easily penetrate body tissue.

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