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Bragg's law

noun, Physics.
the law that the intensity of a crystal reflection of an x-ray is a function of the angle (Bragg angle) that is the complement of the angle of incidence of the x-ray.
1910-15; named after Sir W. H. and Sir W. L. Bragg Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for braggs law

Bragg's law

the principle that when a beam of X-rays of wavelength λ enters a crystal, the maximum intensity of the reflected ray occurs when sin θ = nλ/2d, where θ is the complement of the angle of incidence, n is a whole number, and d is the distance between layers of atoms
Word Origin
C20: named after William and Lawrence Bragg
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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