CAIE IGCSE Physics 5.2.1.1 What Is Meant By Background Radiation Questions

Learn what background radiation is and where it comes from.

Exam points

define background radiation as ionising radiation present in the environment
identify natural and artificial sources of background radiation
distinguish background radiation from radiation measured from a particular source

[Maximum number: 1]

Leaks in underground water pipes are detected using radioactive tracers. Fig. 10.1 shows a radiation detector above a water pipe.

Fig. 10.1

Before the radioactive tracer is added to the water, the detector measures the background radiation above the pipe. The average background radiation is 26 counts/minute.

Define background radiation.

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CAIE IGCSE Physics 5.2.1.1 What Is Meant By Background Radiation Questions question 1