Re: What is the more penetration into the objects, low frequ
I think you are the one who has a BIG MOUTH, as big as your ignorance.
Moderator please, take notes of the insult.
In your reference :
"Because electromagnetic radiation such as normal radio communication cannot
travel through thick conductors such as salt water, communication with submarines when they
are submerged is a difficult technological task which requires specific techniques and devices."
You see, under water there is not radio communication. Electromagnetic radiation
is not possible under water. Acoustic, VLF and ELF all are very LOW frequency, got it?
Even sub-audio........There is not penetration. The mechanism is trough sound.
That is what I meant by Dolphins and Whales, they transmit sound in very low
frequency, and again that is not RF and that is not RF penetration.
Material can be clasified as dielectric or conductor. And in both of them the propa
gation losses are very high. The RF "DOES NOT TRAVEL TROUGH". The RF travel
around, by difraction.
In a wood there is not penetration since the woods are not homo
geneous, there is air between them, so the RF wave travel trough them.
There is a stupid believe among people that there is penetration and you are
one of them.
Get a book about propagation, and stop insulting others.
MODERATOR TAKE NOTE "HE INSULTED ME".
Added after 2 hours 42 minutes:
Quote:
The mechanism behind electromagnetic wave propagation are diverse,
but can generally be attributed to REFLECTION, DIFFRACTION and SCATTERING.
Read Chapter 3, section 3.1, pp. 69 to 74 of Rappaport, "Wireless
Communication", Prentice Hall.
Paul Holland: The next time you open your big mouth try to not to insult.