This type of cable is commonly supplied in ready made DIY telephone extension kits; the type that are plugged in rather than require hard wiring. The reason this cable is so common is that it is very cheap and it is easy to install the connectors on the end.his cable is used for and works well for voice and ADSL as its twisted pair construction provides some resistance to interference. As the CW1308 cable is essentially the same spec cable is used throughout the whole telephone network, it known to work well.
How are visible light waves made? Visible light waves are made when a photon is emitted from a source and has a frequency, or the correct am mount of energy, to create visible light at a specific color.
White light (for example, what comes out of a flashlight) is actually made up of many waves that each exhibit one of the different colors of light (red, orange, yellow, green, blue, and violet). The reason that different waves of light appear to be different colors of light is because the color of a light wave depends on its wavelength. For example, the wavelength of blue light is about 450 nanometers, while the wavelength of red light is about 700 nanometers. A light source that gives off white light is therefore emitting multiple waves of light with a wide range of wavelengths from 450 nanometers through 700 nanometers.