Electromagnetic wave question???

[tiger]

I've thought about it for a long time, but i still don't know about
this.
So please help me,

Wire is used to transmit electric signal.
And Light and RF is transmitted through Vacuum or air.

------------------------------------------------------------------------
(1)ULF ~3Hz
(2)ELF 3Hz~3kHz
(3)VLF 3kHzĄ­30kHz
(4)LF 30kHzĄ­300kHz
(5)MF 300kHzĄ­3MHz
(6)HF 3MHzĄ­30MHz
(7)VHF 30MHzĄ­300MHz
------------------------------------------------------------------------
Micro Wave
(8)UHF 300MHzĄ­3GHz
(9)SHF 3GHzĄ­30GHz
(10)EHF 30GHzĄ­300GHz
------------------------------------------------------------------------
Infrared
(11)submillimeter 300GHzĄ­1THz
(12)Infrared 100THz
------------------------------------------------------------------------
As far as i know, we can generate GHz pulse into wire, but can't
generate infrared light into wire. But there is really Ghz wireless
wave which we are using it with cellphone.

My question is that what is minimum and maximum frequency that we can
generate into wire???