(1) For this Act, radiation is a phenomena caused naturally, or created artificially, that is—
(a) an electromagnetic waveform, quanta or both; and
(b) propagated through space or through a material medium.
(2) Radiation is" ionising "if it is—
(a) capable of producing ions directly or indirectly; and
(b) either—
(i) particulate radiation; or
(ii) electromagnetic radiation of a wavelength of 100 nanometres or less.
(3) Radiation is non-ionising if it is electromagnetic radiation of a wavelength greater than 100 nanometres.