Paul Peter Ewald

Paul Peter Ewald (January 23, 1888 - August 22,1985) was a U.S. (German-born) crystallographer and physicist. He was a pioneer of the X-ray diffraction methods. He was also the eponym of Ewald construction and the Ewald sphere. He was the father-in-law of Hans Bethe.

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January 23 - 1888 - August 22 - 1985 - U.S. - German - Crystallographer - Physicist - X-ray diffraction - Eponym - Ewald construction - Ewald sphere - Hans Bethe

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Paul Peter Ewald was awarded the Max Planck medal in 1987.

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Max Planck medal - 1987

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Ewald wrote several books on the mechanics of solids and liquids, one of which, The Physics of Solids and Fluids (London, Blackie and Son, 1930) was in collaboration with the physicists Th. Pöschl and Ludwig Prandtl. (Also see Prandtl number, an important dimensionless measure of the ratio of the diffusion of momentum and of heat in fluid dynamics.)

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Ludwig Prandtl - Prandtl number - Fluid dynamics

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