Frequency Type of radiation Sources 0 Hz–300 kHz Low frequency to extremely low frequency (LF–ELF) electromagnetic radiation Electrical fields of devices, conventional electrical network, video monitors, sections of AM radio 3 kHz–300 MHz Radio frequencies (RF) Sections of AM radio, FM radio, medical short-wave, nuclear magnetic resonance (NMR) 300 MHz–300 GHz Microwave (MW) Domestic microwave devices, mobile telephones, microwave for  medical physical therapy, radar and other microwave communications 3 *1011 – 3*1014 Hz Infrared (IR) Solar light, heat and laser therapy devices 1014 –1015 Hz Visible light Solar light, phototherapy, laser 1015 –1017 Hz Ultraviolet (UV) Solar light, fluorescent tubes, food/air sterilization, radiotherapy, etc. High frequency ultraviolet (UV) is considered as ionizing radiation

Table 1: Frequencies and sources of non-ionizing radiation