Question

teacher carries out an experiment on radioactivity using the apparatus shown in Fig. 11.1.
The count rate is a measurement of the count during one minute.
(a) (i) State the name of one type of radiation detector. (1)
(ii) State one safety precaution the teacher must take when using a radioactive source. (1)
(b) The teacher states that the emissions from the radioactive source are random in time.
(i) State what is meant by random in time. (1)
(ii) Describe how the apparatus is used to show that the emissions are random in time. (2)
(c) (i) State what is meant by background radiation. (1)
(ii) The teacher measures the count rate due to the source.
Describe how the count rate is corrected for the background radiation.
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Answer 1

Answer:

there is no figure in the question