extremely low frequency
(electromagnetic radiation, frequency 3 Hz to 30 Hz)
Extremely low frequency (ELF) radiation is electromagnetic radiation
defined by the ITU to be within the frequency range of
3 Hz to 30 Hz.
It is considered within the lower-frequency end of the
radio spectrum, or beyond, i.e., subradio.
It is adjacent to super low frequency (SLF) and tremendously low frequency (TLF).
| || |
|9993km||30Hz||124×10-15eV||begin||extremely low frequency|
|99930km||3Hz||12×10-15eV||end||extremely low frequency|
Referenced by pages:
super low frequency (SLF)
tremendously low frequency (TLF)