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mean life
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mean life
noun Physics.
1.
the average time that an unstable particle or nucleus survives before it decays.
Also called average life, lifetime.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Based on the Random House Dictionary, © Random House, Inc. 2012.
Cite This Source
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Mean life
is always a great word to know.
So is excited state. Does it mean:
| a longitudinal wave in an elastic medium, especially a wave producing an audible sensation |
| any of the energy levels of a physical system, such as an atom or molecule, that has higher energy than the lowest energy level |
Collins
World English Dictionary
| mean life | |
| —n | |
| physics τ the average time of existence of an unstable or reactive entity, such as a nucleus, elementary particle, charge carrier, etc; lifetime. It is equal to the half-life divided by 0.693 15 | |
Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
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