تعريف bragg's law في الإنجليزية الإنجليزية القاموس.
equates the angle (\theta) between the incident and scattered ray to the spacing (d) between the crystal planes and the wavelength (\lambda) of the radiation - n\lambda=2d\sin(\theta) \
Relation between the spacing of atomic planes in crystals and the angles of incidence at which the planes produce the most intense reflections of electromagnetic radiation and particle waves. The law, first formulated by Lawrence Bragg, is useful for measuring wavelengths and for determining the lattice spacings of crystals (see crystal lattice), and is the principal way to make precise energy measurements of X rays and low-energy gamma rays. See also William Bragg