# meaning of ELF, VF, ...

P

#### [email protected]

Jan 1, 1970
0
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.

E

#### Eeyore

Jan 1, 1970
0
What is the meaning of ...... VF

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

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#### Stephen J. Rush

Jan 1, 1970
0
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.

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.

M

#### Michael Black

Jan 1, 1970
0
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.

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

E

#### Eeyore

Jan 1, 1970
0
Michael said:
unless there's a new meaning "EMF" is "electromagnetic force"

Electromotive force.

Graham

E

#### Eeyore

Jan 1, 1970
0
Eeyore said:
VF ?

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

I missed E = extremely !

Graham

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#### Stephen J. Rush

Jan 1, 1970
0
No, it's electromotive Force == voltage.

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

M

#### Michael A. Terrell

Jan 1, 1970
0
Stephen J. Rush said:
Of course it is. Sometimes the old cerebral S/N ratio falls off around 4
AM, especially when I'm running short of caffeine.

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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