Since Electromagnetic waves can be 'invisible', and does not require something to travel in, it is ideal for wireless communications. Unlike physical links such as cables and wires, information can still be sent and received despite geographical difficulties such as long distances, mountains, and remote areas.
Electromagnetic waves are useful for communications technology because we know how to generate them and detect them. With the next step, we can then add information to them so that these waves, with their amazing properties, can move this information from one place to another.
Electromagnetic waves are useful for communications technology because we know how to generate them and detect them. With the next step, we can then add information to them so that these waves, with their amazing properties, can move this information from one place to another.
Main properties:
- Speed of travel
- Ability to travel straight
EM waves travel in a straight line unless there is a change in the medium in which they are travelling in(also known as refraction) . This makes using them predictable and we can aim where signals could go. If these waves do not travel in straight lines, then the signals could go anywhere and not reach the intended recipient at all.
- Ability to be reflected
The variation of frequencies allow multiple ways of transmitting information with their own pros and cons (advantages and disadvantages).