According to Bragg's law, if an electromagnetic wave is diffracted when it is passed through a series of small slits spaced a distance d apart and order of diffraction is n and if the angle between the diffracted beam and incident beam is 2θ, then the relationship between the wavelength λ and this angle of diffraction is
1
nλ = 2d sin θ
2
λ = 2dn sin θ
3
λd = n sin 2θ
4
nλ = d sin 2θ