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A '''wave''' is a disturbance that propagates through [[spacetime|space and time]], usually with transference of [[energy]]. A [[mechanical]] wave is a wave that propagates or travels through a [[medium]] due to the restoring [[force]]s it produces upon deformation. There also exist waves capable of traveling through a [[vacuum]], including electromagnetic radiation and probably[1] gravitational radiation. Waves travel and transfer energy from one point to another, often with no permanent displacement of the particles of the medium (that is, with little or no associated [[mass]] transport); they consist instead of oscillations or vibrations around almost fixed locations.
A '''wave''' is a disturbance that propagates through [[spacetime|space and time]], usually with transference of [[energy]]. A [[mechanical]] wave is a wave that propagates or travels through a [[medium]] due to the restoring [[force]]s it produces upon deformation. There also exist waves capable of traveling through a [[vacuum]], including electromagnetic radiation and probably[1] gravitational radiation. Waves travel and transfer energy from one point to another, often with no permanent displacement of the particles of the medium (that is, with little or no associated [[mass]] transport); they consist instead of oscillations or vibrations around almost fixed locations.
<center>For lessons on the [[topic]] of '''''Waves''''', follow [http://nordan.daynal.org/wiki/index.php?title=Category:Waves '''''this link'''''].</center>
<center>For lessons on the [[topic]] of '''''Waves''''', follow [https://nordan.daynal.org/wiki/index.php?title=Category:Waves '''''this link'''''].</center>
==Definitions==
==Definitions==
Agreeing on a single, all-encompassing definition for the term wave is non-trivial. A [[vibration]] can be defined as a back-and-forth motion around a reference [[value]]. However, a vibration is not necessarily a wave. Defining the necessary and sufficient characteristics that qualify a [[phenomenon]] to be called a wave is, at least, flexible.
Agreeing on a single, all-encompassing definition for the term wave is non-trivial. A [[vibration]] can be defined as a back-and-forth motion around a reference [[value]]. However, a vibration is not necessarily a wave. Defining the necessary and sufficient characteristics that qualify a [[phenomenon]] to be called a wave is, at least, flexible.
