What you’ll learn5 learning objectivesChoose one objective for a focused lesson, or study the complete topic.5.2.1.1What is meant by background radiation• Know what is meant by background radiationSyllabus objective5.2.1.2Sources that make a significant• Know the sources that make a significant contribution to background radiation including: (a) radon gas (in the air) (b) rocks and buildings (c) food and drink (d) cosmic raysSyllabus objective5.2.1.3Ionising nuclear radiation can be• Know: ionising nuclear radiation can be measured using a detector connected to a counterSyllabus objective5.2.1.4Count rate measured in counts/s or• Use count rate measured in counts/s or counts/minuteSyllabus objective5.2.1.5Measurements of background radiation• Use measurements of background radiation to determine a corrected count rateSyllabus objective