Lets imagine if somehow a person from 500 years back comes to our world he will be fascinated by magic around him.
People talking over phone, watching television,power of internet, radio etc
We takes all these power obvious but these are result of many people working hard day and night,a junction of many technology working together.
In this post i will try to explain you this technology in simplest words possible
How do information travel
To make it simple let us take an example of lakes to understand it
what happens when you throw a stone in water??
I think all of us know ripples are formed and these ripples are an example of wave which carries information
let us take another example
How speaker send sound ?
They vibrate the air around it and that vibration travels to our ear and our ear interprets that wave as an information
Now it is clear that we need a wave to communicate
Next thing is we pick electromagnetic waves for this purpose because it doesn't need any medium to travel
How do we use it to carry information
There are two process mainly
- Amplitude modulation- used in radio
- Frequency modulation- used in cellphone wifi etc
what is amplitude modulation
Let us take a information may be sound video or anything is form of a wave as shown
Then we draw mirrror image of it shown below
Then we create a wave in between those packets formed BY varying aplitudes
Then we transmit it by transmission tower
we receive this wave from our device which has receiver in it and then the device convert that information into relevant form so we can understand it