Hazards & Uses of Radioactive Emissions & of Background Radiation (AQA GCSE Physics): Flashcards
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Background radiation
Background radiation
Low-level radiation always present in environment
Cosmic rays
Cosmic rays
High-energy particles from outer space
Radon gas source
Radon gas source
Naturally radioactive material from rocks and soil
Nuclear fallout
Nuclear fallout
Residual radioactive material from weapons testing/accidents
Medical radiation sources
Medical radiation sources
X-rays and radiation therapy
Unit for radiation dose
Unit for radiation dose
Sieverts (Sv)
Alpha radiation ionising power
Alpha radiation ionising power
Strongly ionising
What stops alpha particles?
What stops alpha particles?
Dead skin cells
Alpha hazard if inhaled or ingested
Alpha hazard if inhaled or ingested
Hazardous when inside body
Beta radiation ionising power
Beta radiation ionising power
Moderately ionising, less than alpha
Beta radiation penetration
Beta radiation penetration
Can penetrate skin and enter body
Gamma radiation ionising power
Gamma radiation ionising power
Weakly ionising
Gamma radiation penetration
Gamma radiation penetration
Can penetrate deep into body and materials
Peer review
Peer review
Scientific studies evaluated by experts before publication