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optical pumping

noun, Physics, Optics.
1.
a method for increasing the number of atoms or molecules occupying higher energy levels by irradiating them with light of the proper frequencies to raise them to those levels.
Origin of optical pumping
1950-1955
1950-55
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2016.
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Word Value for optical

11
14
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