A simple example of a polarized transverse wave is vibrations traveling along a taut string (see image); for example, in a musical instrument like a guitar string. Depending on how the string is plucked, the vibrations can be in a vertical direction, horizontal direction, or at any angle perpendicular to the string.
Commission on Narcotic Drugs considers future of drug control. 14 March 2008 - The 51 st session of the annual Commission on Narcotic Drugs (CND) wrapped up today.
In veterinary medicine the term narcotic includes any drug that has this effect, but care is needed to avoid confusion with the more common usage of the word to mean the habit-forming drugsâfor example, opiates such as morphine and heroin, and synthetic drugs such as meperidine.