= William Henry Bragg
{c}
{tag=Physicist}
{title2=1862–1942}
{wiki}
= W. H. Bragg
{c}
{synonym}
<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.<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]{ref}
A <physicist> who worked on <crystal scattering> and <Bragg's law>.
Institutional biography: https://www.rigb.org/explore-science/explore/person/william-henry-bragg-1862-1942
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{title=Portrait of <William Henry Bragg>}
{description=Nobel Foundation; portrait dated 1915, published in Sweden in Les Prix Nobel 1915 (1916), page 101; individual photographer unspecified. https://commons.wikimedia.org/wiki/Template:PD-Sweden-photo[Commons PD-Sweden-photo: Swedish public-domain status under its simple-photograph or anonymous-photograph provisions.], via Wikimedia Commons.}
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{width=250}
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