A radiation machine is any device capable of electrically producing ionizing radiation (the term excludes devices containing radioactive material).
Radioactive material is any material (solid, liquid, or gas) which emits radiation spontaneously.
Radiofrequency refers to radiation in the 3 kilohertz (kHz) to 300 gigahertz (GHz) region of the electrometric spectrum.
Near ultraviolet refers to any ultraviolet (UV) light in the 180 to 400 nanometer wavelength region of the electromagnetic spectrum.
Magnetic fields refer to a nuclear magnetic resonance (NMR) system or a magnetic resonance imaging (MRI) system.
A laser is defined as any Class 3B or Class 4 laser system or high intensity light source.
Extremely low frequency refers to electric and magnetic fields in the 1 hertz (Hz) to 100 kilohertz (kHz) region of the electrometric spectrum.