Cables are physical conduits that are used to transmit signals, data, and power. They are made up of a variety of materials and vary in length, size, and complexity. Cables are insulated to protect the signal from external interference, such as electromagnetic radiation (EMR).
EMR is a form of energy that is made up of oscillating electrical and magnetic fields. It travels at the speed of light and can be viewed as a photon or a quanta of energy. EMR includes radio waves, microwaves, infrared, visible light, ultraviolet radiation, X-rays, and gamma rays.
Cables are most often used to transmit data and power, but they can also be used to shield against EMR. This is done by using shielding material, such as copper or aluminum, to create a Faraday Cage around the cable. The shielding material prevents EMR from entering the cable and interfering with the signal inside. The shielding material also helps to prevent EMR from leaving the cable and entering other areas.
Cables are also used to transmit EMR for communications purposes, such as television and radio signals. In these cases, the cable acts as an antenna and transmits the EMR outward into the environment.
Cables are a very important component of many systems, and their ability to shield against EMR is just one of the reasons why. Cables are used to transmit data, power, and EMR in a variety of applications, and they are an essential part of communication technology.