Non-ionizing radiation (or, esp. in
British English, non-ionising radiation) refers to any type of
electromagnetic radiation that does not carry enough
energy per
quantum to
ionize atoms or molecules — that is, to completely remove an
electron from an
atom or
molecule.Instead of producing charged ions when passing through matter, the electromagnetic radiation has sufficient energy only for excitation, the movement of an electron to a higher energy state. Nevertheless, different biological effects are observed for different types of non-ionizing radiation.
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1. Radiation that does not change the structure of atoms but does heat tissue and may cause harmful biological effects. 2. Microwaves, radio waves, and low-frequency electromagnetic fields from high-voltage transmission lines.
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