a. Electromagnetic field: static electric, static magnetic and time variable electric, magnetic and electromagnetic field with frequencies up to 300 GHz. b. Limit value: values determined on the basis of biophysical and biological considerations, in particular scientifically well-established short term and acute direct effects such as thermal effects and electric stimulation of tissue, that must not be exceeded, c. Limit value for health effects: limit values that may cause adverse health effects for exposed employees such as heating and stimulation of nervous and muscular tissue, that must not be exceeded, d. Limit values for sensory effects: limit values that may cause exposed employees to experience temporary sensory disturbances and minor changes to the brain functions, that must not be exceeded, e. Non-coherent optical radiation: artificial optical radiation, with the exception of laser radiation, f. Ionising radiation: X radiation, particle radiation, or radiation from a radioactive substance in the wavelength range between 0.01-10 nm, g. Artificial optical radiation: electromagnetic radiation of a wavelength range between 100 nm and 1 mm that is not emitted from the sun. The spectrum of optical radiation is divided into ultraviolet radiation, visible radiation (light) and infrared radiation,
Ultraviolet radiation: optical radiation of wavelength range between 100 nm and 400 nm. This range is further divided into UVA (315-400 nm), UVB (280-315 nm) and UVC (100-280 nm),
Visible radiation: optical radiation of wavelength range between 380 nm and 780 nm,
Infrared radiation: optical radiation of the wavelength range between 780 nm and 1 mm.
This range is further divided into IR-A (780-1400 nm), IR-B (1400-3000 nm) and IR-C (3000 nm-1 mm),
h. Action value: an exposure value that requires measures to be implemented in order to reduce the health risk and unfortunate exposure to a minimum.