Radiation physics

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Across
  1. 3. the term used to designate a single unit of electromagnetic radiation.
  2. 5. the quantity of x-ray is controlled by what?
  3. 6. filters of which metal that is used to remove long wave length x-ray from the primary beam?
Down
  1. 1. the size of x-ray beam can be reduced by which method?
  2. 2. What is a film badge?
  3. 4. the unit measurement of absorbed dose in x-ray is?