This comparison covers Irradiation vs Contamination within Uses & Hazards of Radiation for GCSE Physics. Revise Uses & Hazards of Radiation in Atomic Structure for GCSE Physics with 17 exam-style questions and 5 flashcards. This topic appears regularly enough that it should still be part of a steady revision cycle. It is section 9 of 16 in this topic. Use this comparison to connect the idea to the wider topic before moving on to questions and flashcards.
⚖️ Irradiation vs Contamination
| Feature | Irradiation | Contamination |
|---|---|---|
| Definition | Exposed to external radiation source | Radioactive material on/in the body |
| Danger level | Depends on type and time | Generally more dangerous |
| Can you reduce exposure? | Yes — move away, use shielding | Much harder — material stays on/in you |
| Example | X-ray, nuclear power worker | Swallowing radioactive material |
| Worst radiation type | Gamma (penetrates to internal organs) | Alpha (concentrated local damage) |
Practice questions for Uses & Hazards of Radiation
Which type of radiation is used in smoke detectors?
Explain how a smoke detector uses an alpha source to detect smoke.
Quick recall flashcards
Most ionising?
Alpha
Beta stopped by?
Few mm aluminium