So in this video, we're going to discuss radio frequency spectrum, which is a part of electromagnetic
spectrum starting from three kilohertz and ending at three hundred gigahertz.
So all the wireless things which you see or hear life between three kilohertz and ending at three hundred
gigahertz.
So this spectrum is divided into further bands, starting from very low frequency, which is VLF.
Then there is a EMF ETF and so on.
So this is a radio frequency spectrum, and you can see almost all the things starting from submarines
to radio stations, satellite telephones, wi fi lies between this spectrum.
So we are going to discuss a little bit about this spectrum.
So over here you can see all the different frequencies and abbreviations and frequency and wavelength.
So very low frequency is abbreviated by VLF and its frequency is three kilohertz and ending at 30 kilohertz,
and its wavelength is starting from 100 kilometers and ending at 10 kilometers.
So this is VLF.
Then there is a level which is low frequency, starting from 30 kilohertz and ending at three hundred
kilohertz, and its wavelength is starting from 10 kilometers and ending at one kilometer.
So for those who don't know about wavelength, let's just discuss the wavelength as well.
So what is wavelength?
Wavelength is a distance between two peaks or two drops, right?
So already here you can see this peak is starting from here or here from the Red Line and ending at
this peak over here.
So starting from here and going down and again, coming at the top peak is up one wavelength.
Similarly, if we see from the trough, start from this trough and and or this drop.
So this is a one wavelength.
So this is a wavelength.
And over here, you can see when the frequency is increasing like an EMF, it's 300 close hertz and
ending a 30 megahertz.
The wavelength is decreasing in low frequency, the wavelength is high or the long wavelength.
What here you can see, I should say it's a long wavelength from one hundred kilometers to 10 kilometers,
a long wavelength.
And if you go at the dome where we get the frequencies increasing like very high frequency and I drive
frequency, the wavelength is getting smaller and smaller, right?
So this is one point which I want to clarify.
And let's just discuss what things lie between these.
Frequencies, so starting from very low frequency, so very low frequencies are used by submarines.
Radio stations to synchronize the clock between two remote locations.
Then there is low frequency, which is alive and it's suitable for long distance communication and it
uses it in broadcasting.
So as I told you before, over here you can see the wavelength is larger.
What here you can see in the wavelength is long.
So that flight used in long distance communication, then there is medium frequency, which is known
as EMF and EMF is a most popular frequency band since the beginning of wireless radio transmission.
And it uses a medium wave broadcasting and immature radio.
Then there is each of which is high frequency, and it's also known as short wavelength or shortwave
broadcasting.
And it's also used in a mature radio and flight communications.
Then there is VHF or very high frequency, very high frequency is used in analogue TV broadcasting,
and it's also used in AM radio broadcasting, starting from 88 megahertz to one of eight megahertz.
Then there is a high frequency, which is UHF, so UHF or ultra high frequency is used in keeps navigation
systems, satellite pagers, Wi-Fi, Bluetooth and television broadcasting.
Then there is, said Jeff, or super high frequency, super high frequency upgrades in line of sight.
That means there should be no obstruction between the transmitter and the receiver.
Otherwise, the communication will break.
So it's also known as point to point communications system, and it uses in satellite digital TV broadcasting
via five four five gigahertz channels.
So this is a use of such RF, which is super high frequency.
Then there is extremely high frequency, which is known as Egypt, and Egypt also uses line of sight.
And that means it also operates on point to point communication and it uses in 5G technology.
So these are all the frequency ranges and our future videos.
We are going to see different things operate on these frequencies, and we will see how to transmit
data and receive data from different things which operate into these frequency ranges.
Thank you.