PH-685
Uses and hazards of radioactivity
Physics · Secondary 3 · Hard · Uses and hazards of radioactivity
A smoke detector in a home contains a tiny sealed source of alpha radiation. Which statement about the hazard of this source is correct?
- It is highly dangerous in normal use because alpha particles pass easily through walls.
- It is safe in normal use, but would be dangerous if the radioactive material were swallowed.
- It is completely safe because alpha radiation is not ionising.
- It is very dangerous because alpha radiation makes surrounding materials radioactive.
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