Common Misconceptions
Part of Uses & Hazards of Radiation — GCSE Physics
This common misconceptions covers Common Misconceptions 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 11 of 16 in this topic. Use this common misconceptions to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 11 of 16
Practice
17 questions
Recall
5 flashcards
⚠️ Common Misconceptions
Misconception 1: "Sterilised food becomes radioactive"
When gamma rays pass through food to sterilise it, they kill bacteria by ionising their DNA. The gamma rays pass through the food — they do not remain in it or make the food radioactive. The food itself has not been made a radioactive source.
Misconception 2: "Alpha radiation is the least dangerous because it can't penetrate skin"
This is only true for external exposure. If an alpha source is swallowed, inhaled, or enters through a wound, it is the most dangerous type because it deposits all its energy in a tiny volume of tissue, causing severe localised damage.
Misconception 3: "Using beta for paper thickness control requires changing the source for different thicknesses"
The same beta source is used. The system works by measuring how much beta gets through and automatically adjusting the rollers. The source itself never needs to be changed.