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Background Radiation

Background radiation - is ionising radiation . Radioactivity that is naturally around us.

It comes from...

  • space (cosmic rays)
  • devices such as x-ray tubes.
  • radioactive isotopes in the environment - Radon gas, gamma rays from rocks.

It can cause cancer, may also cause things like mutation.

Paper blocks ALPHA PARTICLES (or 5cm of air).

3mm of aluminium stops BETA PARTICLES.

Lead or thick concrete blocks GAMMA RAYS.

Isotopes - atoms with same number of protons, different numbers of neutrons.

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Nuclear Fission


(http://www.bbc.co.uk/schools/gcsebitesize/science/images/ph_radio05_v2.gif)

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Nuclear Fusion


nuclei collide and fuse together (http://www.bbc.co.uk/schools/gcsebitesize/science/images/aqaaddsci_05.gif)

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Comments

WhatsHisFace

nice 1

suresh

hi every1

do u know any other free websites for ocr as n a2 physics full notes? 

gavin

very nic ethank you

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