Radioactive Contamination (GCSE Physics)

If a sealed source emits gamma radiation and is surrounded by concrete, what is the primary purpose of the concrete?

What immediate action should you take if your hands become contaminated with a small amount of radioactive powder?

What does the term “half-life” of a radioactive isotope mean?

Why are short half-life radioactive isotopes sometimes preferred for medical imaging?

A worker is handling sealed radioactive sources. Which safety rule most reduces their radiation dose?

A Geiger counter registers 360 counts per minute (cpm). The square root uncertainty (counting statistic) roughly equals the square root of counts in one minute. What is the approximate uncertainty in cpm?

Which route of internal contamination is most likely if someone inhales radioactive dust?

Which is the best shielding material to reduce exposure from gamma radiation in a laboratory?

What is the correct action if an unsealed small spill of radioactive solution occurs in a lab?

Which of the following is a common use of gamma rays in industry or medicine?

Which of these best describes gamma radiation?