Although these waves cancel one another out in most directions through destructive interference , they add constructively in a few specific directions , determined by Bragg 's law : Here `` d '' is the spacing between diffracting planes , formula_2 is the incident angle , `` n '' is any integer , and λ is the wavelength of the beam .
Although these waves cancel one another out in most directions , they add up in a few specific directions , determined by Bragg 's law : Here `` d '' is the spacing between diffracting planes , formula_2 is the incident angle , `` n '' is any integer , and λ is the wavelength of the beam .