Hazards of radiation (AQA GCSE Physics): Flashcards
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13 cards from this deck
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Practise the cards
13 cards from this deck
Ionising radiation
Ionising radiation
Energy that removes electrons from atoms
Ions
Ions
Charged particles formed when electrons are knocked out
Why ionising radiation is dangerous
Why ionising radiation is dangerous
It damages cells in the body
1st safety measure: time
1st safety measure: time
Keep exposure time as short as possible
2nd safety measure: shielding
2nd safety measure: shielding
Wear protective clothing like lead aprons
3rd safety measure: distance
3rd safety measure: distance
Stay as far as possible from radioactive source
What do film badges do?
What do film badges do?
Measure radiation exposure of workers
Alpha particles inside body
Alpha particles inside body
Very dangerous, high activity levels
Alpha particles & skin penetration
Alpha particles & skin penetration
Cannot penetrate skin from outside
How alpha particles harm internally
How alpha particles harm internally
If breathed in or swallowed
Gamma rays vs alpha inside body
Gamma rays vs alpha inside body
Less dangerous, can pass through body
Radiation dose
Radiation dose
Amount of radiation energy body absorbs
3 principles of radiation safety
3 principles of radiation safety
Minimize time, maximize shielding, maximize distance