GCSE Questions: Medical Physics
- scanning and therapy
(a) The different sources of radiation to which we are exposed are shown in the pie chart. Some sources are natural and some artificial.
(i) Name one natural source of radiation shown in the pie chart.
(ii) Name one artificial source of radiation shown in the pie chart.
(b) A radioactive source can give out three types of emission: alpha particles beta particles gamma radiation. The diagram shows the paths taken by the radiation emitted by two sources, X and Y.
What types of radiation are emitted by each of the sources?
(c) The diagram shows a disposable syringe sealed inside a plastic bag.
After the bag has been sealed the syringe is sterilised using radiation.
State what type of radiation is used for this purpose and explain why the radiation can be used to sterilise the syringe.
(Total 7 marks)