4.4.3.1 Background radiation

Spec reference: 4.4.3.1 (physics only).

Triple-only content in this dot

• Background radiation sources: natural (rocks/cosmic) and man-made.
• Radiation dose context (occupation/location) and risk interpretation.

Exam quick-check

• Can I identify this as a triple-only point from wording in the question?
• Can I apply the correct equation/idea with units and a clear conclusion?