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total internal reflection

noun
1.
Optics. total reflection.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for total internal re-flection

total internal reflection

noun
1.
(physics) the complete reflection of a light ray at the boundary of two media, when the ray is in the medium with greater refractive index
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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