Q:

What does the term Ionising radiation refer to?

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What does the term Ionising radiation refer to?


  1. the radiation that is emitted by ionised atoms
  2. that part of the electromagnetic spectrum with wavelengths less than 300 nm which has enough energy to produce ions
  3. alpha, beta and gamma rays spontaneously emitted from radionuclides
  4. radiation with enough energy to produce ionisation in the material which absorbs it

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D: If the radiation produces ions when it interacts with any substance, then it is ionising radiation. Choice B is true but does not include particulate radiation. Choice C is true but does not include x-rays or cosmic rays.

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