Selection_rule Selection_rule

Selection rule - Definition
Related Words: Allocation, Alternative, Alternativity, Assignment, Assortment, Attribution, Batch, Categorization, Characterization, Choice, Collection, Decision, Denomination, Denotation, Differentiation, Disclosure, Discrimination, Draft

In physics, especially in the context of quantum mechanics, a selection rule is a condition constraining the physical properties of the initial system and the final system that is necessary for a process to occur with a nonzero probability. The selection rules often say that a quantum number is conserved or changed by plus one or minus one unit (because the interaction allows one unit of the quantum number to be carried away by another particle).

See also: angular momentum coupling


Hydrogen_orbital_3p.JPG 		 This physics article is a stub. You can help Wikipedia by expanding it (http://www.wordiq.com/definition/Selection_rule).

Example Usage of Selection
mnrqz: Every time I Google News "Ozzie Smith" my outstanding hero Selection is reaffirmed.
FFFFIND: FFFFOUND: manystuff.org — Graphic Design daily Selection http://bit.ly/5vE0nn
tonydavidwood: Great show last night from @theboygeorge, great Selection of songs from his career and fab band too - loved it, loved it, loved it!
Copyright 2009 WordIQ.com - Privacy Policy  :: Terms of Use  :: Contact Us  :: About Us
This article is licensed under the GNU Free Documentation License. It uses material from the this Wikipedia article.