How Wireless Communication Works .

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Offline sr john

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How Wireless Communication Works .
« on: April 01, 2019, 02:42:22 PM »
Have you ever wondered how text messages, pictures, and videos are sent to your wireless phone? Every day billions of devices around the world connect and share data at the speed of light. It may look like magic, but it’s really just a powerful, invisible, and under-appreciated force known as electromagnetism.

Electromagnetism is one of the four fundamental forces in nature. As the name suggests it is the interaction between the electric and magnetic fields. Electricity and magnetism were originally thought to be separate forces, but were unified when James Clerk Maxwell published his Treatise on Electricity and Magnetism in 1873 showing that both phenomena could be explained by one force. In this article, we explore how this force is used in all forms of wireless communication.
Electromagnetic Waves
An electromagnetic wave is a disturbance in the electromagnetic field. This field exists everywhere, and disturbances in this field exist around the presence of electricity or magnetism. If the electromagnetic field is like water in a lake then electromagnetic waves are like ripples in the water.

How Waves Are Transmitted
An electromagnetic wave is created when there is a disturbance in the electromagnetic field. A disturbance like this can be created when you do something as simple as briefly touch both ends of a wire to the terminals of a battery. This allows an electric current to flow through the wire, which in turn creates a weak electromagnetic wave which expands outward in all directions. The wave created in our example would not travel far and would not contain any information. If it were intercepted by a radio transmitter, it would just sound like static. But it’s actually pretty easy to create an electromagnetic wave, and it’s not much harder to use them to send information. .

Spreading The Truth .
Thanks  Sr John .

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