The second order Bragg diffraction of X-rays with λ=1.0Ao from a set of parallel planes in a metal occurs at an angle of 60°. The distance between the scattering planes in the crystal is

  1. A

    0.575Ao

  2. B

    1.00Ao

  3. C

    2.00Ao

  4. D

    1.15Ao

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    Solution:

    =2dsinθ 2×1=2×dsin60d=1.15Ao sin60=32

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