| − | The distance between the crests of a [[wave]], particularly an [[electromagnetic wave]].<ref>Wile, Dr. Jay L. ''Exploring Creation With Chemistry''. Apologia Educational Ministries, Inc. 1998</ref>
| + | '''Wavelength''' is the distance between the crests of a [[wave]], particularly an [[electromagnetic wave]].<ref>Wile, Dr. Jay L. ''Exploring Creation With Chemistry''. Apologia Educational Ministries, Inc. 1998</ref> It is given in units of [[length]] and is the [[reciprocal]] of [[frequency]]. |