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===About Radiation Dose===
: The [[SI Unit]] of '''radiation dose''' is the [[Sievert]] (Sv).
: '''Radiation dose''' is a [[scalar]] quantity as it has [[magnitude]] but does not have a direction.
: The [[magnitude]] of a '''radiation dose''' is related to the harmful effects of [[Ionising Radiation|ionising radiation]]. 1 [[sievert]] represents a 5.5% risk of causing [[cancer]].
: There are sources of [[Ionising Radiation|ionising radiation]] everywhere and [[human]]s receive a '''radiation dose''' from this so called [[Background Radiation|background radiation]].