Coaxial (coax) cables work well to transmit electronic signals (data or anything else). First, let's look at the construction. Coax cables are composed of a center wire that is surrounded by an insulator (or dielectric) and then the whole of the inside is surrounded by a shield (like wire braid). There is (usually) a vinyl or rubberized jacket over the whole thing. The central wire and the shield act similar to two wires in a "twisted pair" configuration. In a basic or simple model of conduction by two wires, a voltage is applied to the ends of the two wires. Current will then flow (if it can) "out" from the source on one wire, and "back" toward that source on the other. At another instant of time, current flow in the wires will be reversed. It doesn't matter if the wires are a flat pair, like in a lamp cord, a twisted pair, like in a pair for connecting a phone, or the two conductors (the center conductor and the shield) as in a coax cable. (Certainly the characteristics are different in all types of conductors. Keep it simple here....) The coax cable has some, um, quirks. But the curious reader can find out more by using the link to the article posted by our friends at Wikipedia, where knowledge is free.
Hi,
A coaxial cable is the same as any other wire other than the fact that it has a center conductor and the other wire lead is wrapped around the center conductor, which is usually separated by a foam core. Without getting into the specifics on dialectric constants, frequency responses and loss in .db/100 feet in length, what it essentially does is use the ground lead as a shield to prevent interference from getting into the center conductor. This makes it ideal for carrying different types of signals that need to be `clean' when it arrives at the termination point.
Hope this helps,
Cubby
Not true.... co-axial cable is of copper construction. Data is transmitted as electromagnetic signals.
rd5yryetyery
The moon gets energy from the sun the same way that all the other bodies in the solar system get energy of the sun. The radiation fro the sun hits it. The reason people say the moon does not give off its own light is because the light we see is the light that is shining on the moon from the sun. The sunlight is hitting that part of the moon, so we can see it, the same way we can see things when sunlight hits them on the Earth.
The phrase "laser beam" refers to the columnated light that is emitted by a Laser.
a type of light, from a beam of light
A light beam or beam of light is a narrow cone of light energy radiating from a small source. In optics, a ray is an idealized narrow beam of light.
A light beam or beam of light is a narrow cone of light energy radiating from a small source. In optics, a ray is an idealized narrow beam of light.
A ray is a narrow beam of light.
Another name for light beam is ray of light. Other similar names are beam of light, shaft of light, and irradiation.
How absorption and scattering can affect a beam of light is if the beam of light is farther away from an object, the light would be dimmer. But, if the beam of light was closer to the object, then the light would appear brighter.
How absorption and scattering can affect a beam of light is if the beam of light is farther away from an object, the light would be dimmer. But, if the beam of light was closer to the object, then the light would appear brighter.
How absorption and scattering can affect a beam of light is if the beam of light is farther away from an object, the light would be dimmer. But, if the beam of light was closer to the object, then the light would appear brighter.
when arrival of a beam of light at a surface
Do you mean fiber cables? If so, each glass fiber carries a beam of light which is modulated by the information being carried. These days the data is usually binary encoded before being transmitted.