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Radiation is an emission of energetic particles or energetic waves In radiation machines these energetic particles are sent through a matter containing media There are two classifications of radiation Radiation can be both Ionizing or non-ionizing Ionizing radiation is radiation with sufficiently high energy that can ionize atoms Wikipedia 2013 Examples of Ionizing radiation include X-rays and gamma rays Non-ionizing radiation are any type of electromagnetic radiation that does not carry enough energy per quantum to ionize atoms or molecules to completely remove an electron from an atom or molecule Wikipedia 2013 Examples of non-ionizing radiation are radio waves heat or visible light Whether Ionizing or non-ionizing either classification of radiation can produce harmful effects or if levels are low enough radiation may go undetected because of their diminutive outcomes Different biological effects include injured or damaged cells that can repair themselves and that results in no damage Another effect can be that cells die which does not seem that big of a deal if you think millions of our body cells die every day through normal biological processes either way Last cells may in incorrectly repair themselves resulting in a biological change USNRC 2012 Fact sheet on biological effects of radiation Ionizing radiation is however far more harmful to living organisms and have the ability to cause damage to DNA Non-ionizing is considered harmless at low powers with no temperature rise but can be damaging depending on the thermal energy deposited All of the ultraviolet energy hitting earth is non-ionizing but through heat effects this non-ionizing radiation can cause sunburns and other effects Non-ionizing radiation is said to have a safe lower limit while ionizing radiation is considered to have no completely safe lower limit Wikipedia 2013 Radiation affects people in different ways
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