Radio frequency spectrum Band nameAbbrFrequency WavelengthUltra high frequencyUHF300–3000 MHz 1 m – 100 mmSuper high frequencySHF3–30 GHz 100 mm – 10 mmExtremely high frequencyEHF30–300 GHz 10 mm – 1 mmAbove 300 GHz < 1 mmRadio frequency www.cs.mcgill.ca › ~rwest › wikispeedia › wpcd › Radio_frequency
Read moreWhat are ELF waves used for?
Extremely low-frequency (ELF) waves are of interest for communications systems for submarines . The relatively weak absorption by seawater of electromagnetic radiation at low frequencies and the existence of prominent resonances of the natural cavity formed by Earth and the ionosphere make the range between 5…
Read moreWhat is ELF frequency used for?
Generally, ELF signals have been used to order a submarine to rise to a shallow depth where it could receive some other form of communication .
Read moreAre ELF waves harmful?
It’s not clear that exposure to ELF radiation is harmful , but there are things you can do to lower your exposure if you are concerned. Your exposure is based on the strength of the ELF radiation coming from each source, how close you are to each, and how long you spend in the field.18 Nis 2017
Read moreWhat causes ELF radiation?
Power lines, household wiring, and any device that uses electricity can generate ELF radiation.18 Nis 2017
Read moreWhat does ELF energy mean?
Extremely low frequency (ELF) electric and magnetic fields exist wherever electricity is generated, transmitted or distributed in powerlines or cables, or used in electrical appliances.
Read moreWhat does ELF and EMF mean?
Extremely low-frequency EMFs (ELF-EMFs). This non-ionizing radiation field can be generated by a variety of sources, including power lines, electrical wiring, and personal appliances like electric shavers, hair dryers, and electric blankets.
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