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Bragg's Law For Diffraction

\LARGE 2d\sin\theta = n\lambda

The Terms

d - Spacing between planes in the atomic lattice [Units: m]

\theta - Angle between the incident wave and the scattering planes

n - An integer determined by the order

\lambda - Wavelength of the incident wave [Units: m]

What Does It Mean

In crystallography, this equation is used to find the angles of coherent and incoherent scattering off a crystal lattice. For direction in which the above equation is satisfied, waves scattered from atomic planes separated by a distance d interfere constructively and produce maxima on the diffraction pattern.

Further information at Warwick

Bragg's Law of Diffraction is covered in the third year module "PX393 Crystal Physics".


William Lawrence Bragg