from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The fundamental law of x-ray crystallography, nλ = 2dsinθ, where n is an integer, λ is the wavelength of a beam of x-rays incident on a crystal with lattice planes separated by distance d, and θ is the Bragg angle.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. equates the angle between the incident and scattered ray to the spacing between the crystal planes and the wavelength of the radiation -
After Sir William Henry Bragg and Sir William Lawrence Bragg.(American Heritage® Dictionary of the English Language, Fourth Edition)