Bragg's law and its applications in chemistry
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Answer:-
Bragg’s Law was introduced by Sir W.H. Bragg and his son Sir W.L. Bragg. The law states that when the x-ray is incident onto a crystal surface, its angle of incidence, θ , will reflect back with a same angle of scattering, θ . And, when the path difference, d is equal to a whole number, n , of wavelength, a constructive interference will occur.
Consider a single crystal with aligned planes of lattice points separated by a distance d. Monochromatic X-rays A, B, and C are incident upon the crystal at an angle θ. They reflect off atoms X, Y, or Z.
Bragg’s Law:- nλ=2dsinθ
where:
• λ is the wavelength of the x-ray,
• d is the spacing of the crystal layers (path difference),
• θ is the incident angle (the angle between incident ray and the scatter plane), and
• n is an integer
