Radioactive decay, half-life and uses

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Question 71
Easy

A student uses a Geiger-Müller tube and a counter to measure the background radiation in a laboratory.

The reading on the counter is 28 counts per minute.

The student then places a gamma radiation source 20 cm in front of the Geiger-Müller tube.

The new reading on the counter is 385 counts per minute.

Calculate the count rate that is detected from the gamma source alone.

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Radioactive decay, half-life and uses Questions

  1. GCSE
  2. /Physics
  3. /Radioactive decay, half-life and uses