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meaning of ELF, VF, ...

Discussion in 'Electronic Basics' started by [email protected], Apr 27, 2007.

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  1. Guest

    What is the meaning of ELF, VF, VLF, LF, MF, HF, UHF, SHF, EMF in
    electromagnetic spectrum?
    I want to know the long term of them. thanks.
     
  2. Eeyore

    Eeyore Guest

    VF ?

    F = frequency.
    L = low
    M = medium
    H = high
    V = very
    U = ultra
    S = super


    Electromotive force = voltage.

    You could have used Google actually or Wikipedia.

    http://en.wikipedia.org/wiki/Electromagnetic_spectrum


    Graham
     
  3. Eeyore

    Eeyore Guest

    Wikipedia says Voice Frequency but I've never heard anyone use that one.

    More usual is AF = audio frequency as opposed to RF = radio frequency.

    Graham
     
  4. I started to write a list of definitions, but it's easier to just
    point to Wikipedia:

    http://en.wikipedia.org/wiki/Electromagnetic_spectrum

    "EMF" refers to the electromagnetic field, any frequency.
     
  5. The "F" in all of them mean "Frequency". The other letters denote the
    segment of the spectrum, and it's not a code. Each are the first letters
    of a real word, that describes where in the spectrum the segment is.

    The caveat is that I've never heard of "VF", you're missing "VHF" (after
    "HF") and unless there's a new meaning "EMF" is "electromagnetic force"
    and doesn't belong with the others.

    Since you have the right ordering, then figure it out yourself.
    If at one end the frequencies are lowest, and the other end the frequencies
    are highest, then what in the world might "ELF" mean?

    Make an obvious guess, and that may be the key to the rest.

    Michael
     
  6. Eeyore

    Eeyore Guest

    Electromotive force.

    Graham
     
  7. Eeyore

    Eeyore Guest

    I missed E = extremely !

    Graham
     
  8. Rich Grise

    Rich Grise Guest

    No, it's electromotive Force == voltage.

    Cheers!
    Rich
     
  9. Of course it is. Sometimes the old cerebral S/N ratio falls off around 4
    AM, especially when I'm running short of caffeine.
     

  10. That is a mortal SIN! You must maintain proper caffeine levels at
    all times! ;-)


    --
    Service to my country? Been there, Done that, and I've got my DD214 to
    prove it.
    Member of DAV #85.

    Michael A. Terrell
    Central Florida
     
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