Background radiation. The natural radiation that is always present in the
environment. It includes cosmic radiation which comes from the sun and stars,
Naturally-occurring background radiation is the main source of exposure for most
... average over 15 millisievert per year from gamma radiation in addition to.
Background radiation: Radiation that comes from environmental sources
including the earth's crust, the atmosphere, cosmic rays, and radioisotopes.
A secondary school revision resource for AQA Additional GCSE Science about
atoms, radiation and nuclear radiation.
Background radiation definition at Dictionary.com, a free online dictionary with
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This lesson will define background radiation, explain how it is measured, discuss
some of the sources and examples of background radiation, and...
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 ...
Natural background radiation. Australians are exposed to radiation from a variety
of natural and artificial sources. We are all exposed constantly to ionising ...
Nov 19, 2014 ... The annual average effective dose from natural background radiation is
approximately 1.8 millisieverts (mSv) in Canada and 2.4 mSv ...
Natural Background Radiation. January 2013. Fast Facts. • Radiation has always
been present and is all around us in many natural forms. Life has evolved in a ...