Bragg's law

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When a beam of X-rays (wavelength λ) strikes a crystal surface in which the layers of atoms or ions are separated by a distance d, the maximum intensity of the reflected ray occurs when sinθ = nλ/2d, where θ (known as the Bragg angle) is the complement of the angle of incidence and n is an integer. The law enables the structure of many crystals to be determined. It was discovered in 1912 by Sir William Lawrence Bragg.

Subjects: Chemistry.

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