angle of reflection

noun Physics.
the angle that a ray of light or the like, reflected from a surface, makes with a normal to the surface at the point of reflection.

Origin:
1630–40

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
angle of reflection
 
n
the angle that a beam of reflected radiation makes with the normal to a surface at the point of reflection

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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American Heritage
Science Dictionary
angle of reflection  
The angle formed by a ray or wave reflected from a surface and a line perpendicular to the surface at the point of reflection.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
The angle of reflection is the angle between the normal line and the reflected light ray.
Moreover, turning or tilting the grating allows the lasing wavelength to be tuned by changing the angle of reflection.
Light incident on a smooth plane surface is reflected such that the angle of incidence equals the angle of reflection.
Students know the angle of reflection of a light beam is equal to the angle of incidence.
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