Bragg's law

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.

Origin:
1910–15; named after Sir W. H. and Sir W. L. Bragg

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Bragg's law
 
n
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
 
[C20: named after William and Lawrence Bragg]

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