selection rule
noun
: a rule that states which of all the conceivable changes in the state of a quantized system (atoms, nuclei, or related entities) are physically possible under specified circumstances usually in terms of the possible numerical changes in the quantum numbers that characterize the system compare allowed, forbidden
Dictionary Entries Near selection rule
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“Selection rule.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/selection%20rule. Accessed 28 Nov. 2024.
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