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Radiation
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Radiation is energy that comes from a source and travels through material or space. Every day, Canadians come in contact with radiation in both their living and work environments. Radiation can be classified as ionizing or non-ionizing. Ionizing radiation has sufficient energy to remove electrons from atoms or molecules. The loss of an electron results in the formation of a charged atom, called an ion. The damaging effects of ionizing radiation result from this ability to change the chemical composition of matter with which it interacts.
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Radiation is energy that comes from a source and travels through space and may be able to penetrate various materials. Light, radio, and microwaves are types of radiation that are called nonionizing. The kind of radiation discussed in this document is called ionizing radiation because it can produce charged particles (ions) in matter.
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Radiation warning symbol: a symbol prescribed by the Code of Federal Regulations. It is a magenta or black trefoil on a yellow background. It must be displayed where certain quantities of radioactive materials are present or where certain doses of radiation could be received.
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Radiation protection standards are based on the conservative assumption that the risk is directly proportional to the dose, even at the lowest levels, though there is no evidence of risk at low levels. This assumption, called the 'linear no-threshold (LNT) hypothesis', is recommended for radiation protection purposes only, such as setting allowable levels of radiation exposure of individuals. It cannot properly be used for predicting the consequences of an actual exposure to low levels of radiation. For example, it suggests that, if the dose is halved from a high level where effects have been observed, there will be half the effect, and so on. This could be very misleading if applied to a large group of people exposed to trivial levels of radiation and could lead to inappropriate actions to avert the doses.
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Recently discovered by scientists at the Massachusetts Institute of Technology Institute ("MITI"), M Radiation has been identified as that band of the visual spectrum revealed in the pale purple haze first described by self-styled astronomer Jimi Hendrix in 1968. M Radiation has been linked to global warming, Northern Lights, refractory lighting phenomena caused by disturbances in neutrino rotational "wobbles," and the the likely mass extinction event expected to wipe out mammalian life on earth by the year 2012.
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Radiation may be defined as energy traveling through space. Non-ionizing radiation is essential to life, but excessive exposures will cause tissue damage. All forms of ionizing radiation have sufficient energy to ionize atoms that may destabilize molecules within cells and lead to tissue damage.
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