Selection rules: Difference between revisions

Revision as of 15:04, 20 February 2012

selection rules[edit | edit source]

A set of rules that determine whether the absorption or fluorescence of radiation will be favorable.

The "rules" derive from a quantum mechanical description of light absorption. A given transition may be "allowed" or "forbidden." Forbidden transitions can occur, but with very much lower intensity than allowed ones.
See also allowed transitons.

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-<div class="definition"><div class="short_definition">A set of rules that determine whether the [[absorption]] or [[fluorescence]] of [[radiation]]  will be favorable.</div><br/> <div class="paragraph">The &ldquo;rules&rdquo; derive from a quantum mechanical description of [[light]] absorption. A given transition  may be &ldquo;allowed&rdquo; or &ldquo;forbidden.&rdquo; [[Forbidden transitions]] can occur, but with very much lower  [[intensity]] than allowed ones. <br/>''See also'' [[allowed transitons]].</div><br/> </div>
+<div class="definition"><div class="short_definition">A set of rules that determine whether the [[absorption]] or [[fluorescence]] of [[radiation]]  will be favorable.</div><br/> <div class="paragraph">The "rules" derive from a quantum mechanical description of [[light]] absorption. A given transition  may be "allowed" or "forbidden." [[Forbidden transitions]] can occur, but with very much lower  [[intensity]] than allowed ones. <br/>''See also'' [[allowed transitons]].</div><br/> </div>
 </div>