Why radiation is harmful Flashcards

1
Q

What does irradiation mean

A
  • The process by which an object is exposed to radiation
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2
Q

What does contamination mean (radiation)

A
  • When radioactive particles get onto an object
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3
Q

When is contamination harmful

A
  • Contamination itself is not harmful
  • The radioactive substance is likely to decay which will then cause increased levels of irradiation
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4
Q

What does the type of radiation have to do with how harmful it is

A
  • Non-ionising vs ionising radiation
  • Ionising radiation can enter living cells and interact with molecules
  • Ionising radiation can ionise our DNA and cause mutations. Uncontrolled mutations can lead to cancer
  • Exposure to UV radiation can also lead to cancer
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5
Q

What does location have to do with how harmful radiation is

A
  • Outside the body = aloha can’t penetrate skin so not harmful
  • Inside the body = alpha is the most harmful
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6
Q

What is the dosage of a radioactive substance dependent on

A
  • Duration of exposure
  • Distance from substance
  • Strength of substance
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7
Q

Can irradiated substances pass radiation

A
  • No
  • People (irradiated substance) can not radiate other people
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