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stimulated emission
stim·u·lat·ed e·mis·sion


noun 
Definition:
 
two photons after one hits atom: the process in which a photon hits an atom and produces two photons of the same frequency traveling in the same direction. It is the process enabling lasers to operate.
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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