Background radiation. The natural radiation that is always present in the
environment. It includes cosmic radiation which comes from the sun and stars,
Natural background radiation comes from the following three sources: ... The sun
and stars send a constant stream of cosmic radiation to Earth, much like a ...
Naturally-occurring background radiation is the main source of exposure for most
... background radiation gives an annual dose of more than 50 mSv and up.
Background radiation: Radiation that comes from environmental sources
including the earth's crust, the atmosphere, cosmic rays, and radioisotopes.
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A secondary school revision resource for AQA Additional GCSE Science about
atoms, radiation and nuclear radiation.
In Australia people receive about 1.5 - 2.0 'millisieverts' of ionising radiation every
year. This is natural background radiation. Low exposure to ionising radiation ...
A secondary school revision resource for OCR Gateway Additional GCSE
Science about radiation and uses of radioisotopes.
This radiation is called background radiation. Most of the background radiation
the body is exposed to is from natural sources and is called natural background ...
Nov 19, 2014 ... The annual average effective dose from natural background radiation is
approximately 1.8 millisieverts (mSv) in Canada and 2.4 mSv ...