On 8 June 1912, Sommerfeld presented to the Academy in Munich the theoretical and experimental work of the three and in 1914 von Laue received the Nobel Prize for Physics "for the discovery of x-ray diffraction".
The undulatory nature of x-rays was later confirmed by Arthur Holly Compton (1892-1962), a professor in Chicago, by causing their diffraction by a reflection grating with grazing incidence.
Compton was assigned the Nobel Prize for Physics (1927) but "for the discovery of the effect bearing his name".