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Radiation Protection Glossary

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Distance
Distance, in the context of Radiation Protection , relates to one of the three key principles of protection against External Radiation hazards (i.e. Time , Distance & Shielding ). In simple terms, increasing the distance between a static source of Ionising Radiation and the absorbing medium (e.g. a person) will reduce the exposure to that person. For certain defined geometries, (e.g. Point Source ), the Inverse Square law can be applied which can be stated as: 'double the distance, quarter the dose'.