wireless communication. How does the signal know where to go? How is data transmitted through air?
In: 0
Wireless communication almost always uses electromagnetic waves or other electromagnetic phenomena like magnetic fields. Sound is an alternative but quite impractical for most applications.
Light is an electromagnetic wave too. If you look at it for communication the main difference is that lots of material that is not transparent to visible light is transparent to radio waves.
The transition of information is like if you do it by blinking with a lamp. Use morse code with a blinking lamp and you have wireless communication. Signal lamps are used that way on military ships for communication.
You can have a lamp that emits light in all directions equally. You can also have a lamp with a reflector that only emits light in one direction. the light does not know where to go, to direct it you need to do it at the sender.
Radio signal do not know where to go just like light, but the device that send them can do that in a specific direction.
Latest Answers