Definitions (2)
Related Terms
1. Direct transmission of heat or electromagnetic energy through space or another medium. It is the 'non-ionizing' type of radiation that does not affect chemical bonds and thus is usually harmless. Also called radiant energy.
2. Particulate emanation of unstable or split atomic nuclei, such as protons or helium nuclei (alpha radiation), high-energy electrons (beta radiation), and neutrons (from fission). It is the 'ionizing' type of radiation that directly breaks down chemical bonds and is likely to be harmful.

Use 'radiation' in a Sentence

The warm light from the sun, the radio signal from your phone, and the microwaves in a microwave oven are all examples of the same electromagnetic RADIATION.
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After the accident in reactor plant, radiation from the core spread and burned down the entire compound in which the core was housed.
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When the atomic bombs were dropped on Japan there was a lot of radiation that killed people and caused all sorts of problems for the country.
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