Background Radiation

Radiation is all around us

Natural Sources of Radiation

- Radioactive Rock → Found in the ground e.g, graphite

- Cosmic rays from space →Very high energy particles which travel through space and crash into the Earth’s atmosphere e.g supernova

Man-made Sources of Radiation

- Fall out from nuclear weapons testing → It has released radioactive isotopes into the environment for decades

- Nuclear accidents → Radioactive isotopes are released by accidents at nuclear power station

Radiation Dose

- The dose of radiation is measured in sieverts (Sv)

- One millisievert (mSv) is 1/1000/ divided by 1000 of a sievert