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Smallest angle of diffraction for an X-ray beam of wavelength 0.71 is (in degrees).
    Correct answer is '5.6'. Can you explain this answer?
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    Smallest angle of diffraction for an X-ray beam of wavelength 0.71 is ...
     For [1 1 1] Plane, 
    For smallest angle,


    The correct answer is: 5.6
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    Smallest angle of diffraction for an X-ray beam of wavelength 0.71 is ...
    For [1 1 1] Plane, d=a/√(12+12+12)=a/√3
                                 2dsinθ=λ
    For smallest angle, θ=sin-1(λ/2d)
    θ=sin-1(λ/2d)
      =sin-1(λ/(2a/√3)=sin-1(√3x0.71/2x6.3)
    => θ=5.6o
    So the correct answer is 5.6.
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    Smallest angle of diffraction for an X-ray beam of wavelength 0.71 is ...
    But miller indices and a is not given in the question
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    Smallest angle of diffraction for an X-ray beam of wavelength 0.71 is (in degrees).Correct answer is '5.6'. Can you explain this answer?
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