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Incoming links: Lawrence Bragg
Lawrence Bragg Created 2026-10-24 Updated 2026-11-05
Lawrence Bragg explained crystal diffraction through interference between radiation scattered by parallel lattice planes. Rays from successive planes differ in path length by , so constructive interference gives Bragg's law, . Combining measured angles with this relation allows atomic arrangements to be tested through their predicted diffraction pattern. His 1913 structure analysis helped connect a small set of geometrical crystal models with measurable reflection intensities.[ref]
The Structure of Some Crystals as Indicated by their Diffraction of X-rays by William Lawrence Bragg. Proceedings of the Royal Society A 89, 248–277 (1913), structure inference from diffraction
William Henry Bragg Created 2026-10-18 Updated 2026-11-05
William Henry Bragg developed experimental methods that turned crystal diffraction into X-ray spectroscopy. A crystal selects reflected radiation at particular angles, while a movable detector measures the reflected intensity. Relating these peaks to lattice-plane spacing connects an instrument reading with the wavelength of the incident radiation. His joint work with Lawrence Bragg established a quantitative relation between crystal geometry and X-ray reflection, helping make diffraction a practical probe of both radiation and structure.[ref]
The Reflection of X-rays by Crystals by William Henry Bragg and William Lawrence Bragg. Proceedings of the Royal Society A 88, 428–438 (1913), reflection measurements and crystal geometry
Portrait of William Henry Bragg
. Nobel Foundation; portrait dated 1915, published in Sweden in Les Prix Nobel 1915 (1916), page 101; individual photographer unspecified. Commons PD-Sweden-photo: Swedish public-domain status under its simple-photograph or anonymous-photograph provisions., via Wikimedia Commons. Source.