Astrophysics (Index)About

high frequency

(HF)
(electromagnetic radiation, frequency 3-30 MHz)

Radio astronomy uses the term high frequency (HF) which is the ITU term for the radio spectral band from 3-30 MHz, with the term very high frequency (VHF) as the next step for higher frequency. These are used within communications for FM radio and television. Radio astronomers sometimes use HF/high frequency in this manner but may sometimes use the term in a more general sense for relatively high frequencies within the radio band, extending much higher than 30 MHz, e.g., extending into microwave.


(EMR,spectrum,band)
Further reading:
http://en.wikipedia.org/wiki/High_frequency
WaveLFreqPhoton
Energy
  
10m30MHz124neVbeginhigh frequency
100m3MHz12neVendhigh frequency

Referenced by pages:
pulsar (PSR)
radio

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