Which band has lowest frequency?

ITU Band nameAbbreviationFrequency and WavelengthExtremely low frequencyELF3–30 Hz 100,000–10,000 kmSuper low frequencySLF30–300 Hz 10,000–1,000 kmUltra low frequencyULF300–3,000 Hz 1,000–100 kmVery low frequencyVLF3–30 kHz 100–10 kmRadio spectrum – Wikipedia en.wikipedia.org › wiki › Radio_spectrum

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What is extremely high frequency band?

Extremely high frequency (EHF) is the International Telecommunication Union (ITU) designation for the band of radio frequencies in the electromagnetic spectrum from 30 to 300 gigahertz (GHz) . It lies between the super high frequency band and the far infrared band, the lower part of which is the terahertz band.

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